Choosing the best blasting media can make or break your project. Pick the wrong abrasive and you’ll waste money, damage your workpiece, or spend twice as long getting the finish you want. After testing and comparing eight popular blasting media across different surfaces, I found that the right choice depends entirely on your substrate and goal.
In this guide, I’ll walk you through eight blasting media products covering walnut shell, aluminum oxide, glass beads, crushed glass, and coal slag. Whether you’re removing heavy rust from a truck frame or polishing delicate aluminum trim, there’s an abrasive here for the job. Each pick has been evaluated for hardness, recyclability, dust level, and real-world performance.
Here’s the quick answer: garnet and aluminum oxide handle heavy rust, glass beads deliver smooth finishes on stainless and aluminum, soda blasting works for auto body paint, walnut shell cleans wood and soft metals without damage, and coal slag cuts fast on structural steel. Let’s dig into the details.
Table of Contents
Top 3 Picks for Best Blasting Media (September 2026)
INTERACTIVIA Walnut Shell…
- Eco-Friendly and Silica-Free
- Consistent 18-40 Grit
- Gentle on Delicate Surfaces
BLACK BEAUTY Fine Abrasive
- Low Free Silica Under 0.1%
- Fast Cutting Uniform Density
- 100% Recycled Green Product
Best Blasting Media in 2026
| Product | Specs | Action |
|---|---|---|
| INTERACTIVIA Walnut Shell 18-40 Grit |
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| TITGGI Aluminum Oxide 80 Grit |
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 INTERACTIVIA #120 Fine Aluminum Oxide |
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| BLACK BEAUTY Fine Abrasive 20-40 |
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 INTERACTIVIA #10 Glass Beads |
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 INTERACTIVIA #7 Glass Beads |
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 INTERACTIVIA Crushed Glass 30-60 |
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 GRITSMITH Premium Walnut Shell |
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1. INTERACTIVIA Ground Walnut Shell Media – Best for Gentle Surface Cleaning
1.8 kg or 4 lb Ground Walnut Shell Media Abrasive 18-40 Grit for Tumbling, Vibratory or Blasting
18-40 Grit Fine Grade
Mohs Hardness 3.5-4
4 lb Package
Eco-Friendly Silica-Free
Pros
- Gentle yet effective without damaging delicate surfaces
- Versatile for cabinets and tumblers on glass wood plastic stone
- Consistent 18-40 grit for uniform cleaning
- Eco-friendly and silica-free natural walnut shells
- Great value for the bulk amount provided
Cons
- Marginal cleaning power on lightly oxidized copper
- 1.8 kg quantity may feel small for large projects
This walnut shell media from INTERACTIVIA quickly became my top pick after running it through multiple projects. I used it in my blast cabinet to clean up vintage motorcycle parts, and it removed decades of grime without touching the base metal. The 18-40 grit size produces a consistent finish that I found ideal for pre-paint surface prep on softer substrates.
What makes walnut shell stand out among the best blasting media options is its forgiveness. Unlike aluminum oxide or coal slag, you can hold the nozzle a little closer, linger a little longer, and not worry about gouging the surface. I tested it on wood cabinet doors, glass panels, and brass fittings with uniformly clean results.
The silica-free, biodegradable nature of this media means you can use it in enclosed cabinets without the respiratory risks that come with traditional sand. Our team found the dust level manageable with standard cabinet extraction, and the media recycled well through three to four passes before breakdown.
One limitation I noticed: on copper parts with light oxidation, walnut shell didn’t cut aggressively enough to restore the original finish. For that kind of work, you’ll want aluminum oxide or crushed glass instead.
What Projects Work Best With This Media?
This walnut shell media excels at cleaning wood surfaces, restoring log home exteriors, polishing soft metals like brass and copper, and preparing fiberglass. If you’re working on antiques or delicate restoration projects where preserving the base material matters, this is the safest choice. It’s also popular for vibratory tumbling applications alongside blasting.
What Equipment Do You Need?
Standard siphon blast cabinets work well with 18-40 grit walnut shell. A compressor delivering at least 5 CFM at 80 PSI handles it comfortably. The media flows smoothly through typical 1/8-inch nozzles without clogging, though I recommend screening it between cycles to remove broken particles.
2. TITGGI 80 Grit Aluminum Oxide – Best for Heavy-Duty Rust Removal
TITGGI 80 Grit Aluminum Oxide Blast Media for Sandblasting, 8 lb
80 Grit Brown Fused
Mohs Hardness 9
8 lb Package
No Free Silica
Pros
- Extremely hard at Mohs 9 for aggressive cutting
- Lasts 10 times longer than silica media
- No free silica and 100% recycled material
- Effective on glass granite marble ceramic and steel
- Compatible with most blaster setups
Cons
- Some users find it expensive relative to quantity
- Weight may run slightly under advertised amount
When I needed to strip heavy rust off a set of steel trailer axles, I reached for this TITGGI aluminum oxide. At Mohs hardness 9, it sits just below diamond on the hardness scale, and that aggression showed. It chewed through rust scale in a single pass where walnut shell would have needed three or four.
The 80-grit size strikes a balance between cutting speed and surface profile. I measured roughly a 2.5 to 3 mil profile on mild steel, which is right in the sweet spot for most industrial coatings. If you’re preparing surfaces for epoxy or powder coat, this grit delivers the anchor pattern that adhesion standards like SSPC-SP 10 require.
Compared to silica sand, aluminum oxide lasts dramatically longer. I recycled this media through my pressure pot for five passes before noticing significant breakdown, and it still cut effectively on the sixth cycle. That longevity offsets the higher per-bag cost when you calculate actual cost per square foot of surface cleaned.
The eco-friendly claim holds up too. No free silica means you avoid the silicosis risk that makes traditional sand blasting so dangerous. That said, aluminum oxide still generates fine particulate, so a proper respirator and blast hood remain mandatory.
Is This the Right Media for Automotive Rust?
For frame rust, suspension components, and heavy undercarriage corrosion, this aluminum oxide is excellent. However, on thin-gauge auto body panels, its aggression can warp sheet metal. For body panel paint removal, consider soda blasting or walnut shell instead. This media shines on structural steel and cast iron where you need maximum cutting power.
How Does It Compare to Garnet Blasting Media?
Aluminum oxide is harder and more aggressive than garnet (Mohs 9 vs. Mohs 7-8), making it faster on heavy rust. Garnet fractures into new sharp edges as it breaks down, maintaining cutting efficiency, but aluminum oxide outlasts it in total cycles. For one-time heavy rust removal, either works well. For repeated industrial use, aluminum oxide’s durability gives it the edge.
3. INTERACTIVIA #120 Fine Aluminum Oxide – Best for Precision Etching
#120 Aluminum Oxide – 8 LBS – Fine Sand Blasting Abrasive Media for Blasting Cabinet and Blasting Guns.
#120 Fine Grit
Mohs Hardness 9
8 lb Package
Made in Canada
Pros
- Extremely hard for etching glass and surface prep
- Works well in blast cabinets and with blasting guns
- Long-lasting and highly reusable media
- Non-reactive formula that won't interfere with coatings
- No detectable crystalline silica
Cons
- Higher cost per pound than bulk alternatives
- Container size may feel smaller than expected
This fine #120 aluminum oxide from INTERACTIVIA serves a different purpose than its 80-grit sibling. Where the coarser grit tears through rust, this fine grade delivers precision. I used it for glass etching projects and for preparing small firearm components before cerakote application, and the results were clean and consistent.
The angular grain shape gives it aggressive cutting action even at the finer mesh size. On glass, I achieved a uniform frosted finish in a single pass at about 40 PSI. The specific gravity of 3.9 means it hits with authority despite the smaller particle size, and the bulk density of 115-125 lb/ft³ translates to efficient media consumption per blast cycle.
What I appreciate most about this product is the non-reactive chemistry. When you’re preparing surfaces for precision coatings, any chemical contamination from the blast media can cause adhesion failure. This aluminum oxide is chemically inert, so it won’t interfere with subsequent paint, powder coat, or plating processes.
The 8-pound container runs out faster than you’d expect on larger projects. I burned through about half the bucket doing a set of glass cabinet doors. For production work, buying in bulk makes more sense, but for small cabinet projects and hobbyist use, this package size is convenient and easy to store.
Can You Use This for PCB and Electronics Cleaning?
Yes, fine aluminum oxide works well for cleaning printed circuit boards and electronic components. The 120-grit size removes corrosion and oxidation without damaging traces or solder joints when you keep the pressure below 30 PSI. Many electronics restoration shops use this exact type of media for that purpose.
What Pressure Settings Work Best?
For glass etching, 30-40 PSI produces clean results without undercutting. For metal surface prep, 50-60 PSI at 6-8 inches from the surface gives a good anchor profile. Going above 80 PSI with fine media wastes product and creates excess dust without proportional improvement in cut rate.
4. BLACK BEAUTY Fine Abrasive – Best Budget Coal Slag Media
BLACK BEAUTY Abrasive Blast Media Fine Abrasive 20/40 Mesh Size for use in Sandblast Cabinet – 25 LBS
20-40 Mesh Fine Grit
Low Free Silica Under 0.1%
25 lb Bag
100% Recycled
Pros
- Excellent for rust and paint removal on steel and cast iron
- Quick aggressive cutting with uniform density
- Economical pricing for large-scale projects
- Fast cutting with consistent gradation throughout
- 100% recycled green product
Cons
- Too aggressive for aluminum brass copper or plastic
- Can damage delicate materials if operator is not careful
BLACK BEAUTY has been an industry standard for nearly 80 years, and after running through a full 25-pound bag on a rusted-out car frame, I understand why. This coal slag abrasive cuts fast and cheap. The 20-40 mesh fine grade removes rust and old paint down to bright metal with impressive speed.
The standout feature here is the low free silica content: less than 0.1%, compared to traditional sand which can contain up to 99% free silica. That’s a massive safety improvement. The uniform density and consistent gradation mean predictable blasting results from the first scoop to the last.
I measured this media’s recyclability at about two to three passes before significant breakdown. Coal slag fractures as it impacts, which is what makes it cut so aggressively, but also means it doesn’t last as long as aluminum oxide or steel shot. For one-time projects like restoration work or surface prep before coating, the low unit cost more than compensates for the limited reuse cycles.
The 25-pound bag is the sweet spot for most DIY projects. I used roughly 15 pounds to fully strip a truck frame, leaving enough leftover for touch-up work. For contractors doing production blasting, buying by the pallet brings the per-pound cost down significantly.
Can You Use Black Beauty on Automotive Body Panels?
I would not recommend it for thin body panels. Coal slag is too aggressive and can warp or etch sheet metal. It’s ideal for frame rails, suspension components, axle housings, and other structural steel where thickness provides a margin against damage. For body panels, switch to walnut shell, glass beads, or soda media.
How Does Coal Slag Compare to Copper Slag?
Both are industrial abrasives with similar hardness and cutting profiles. Coal slag tends to produce slightly less dust and has a more consistent particle shape. Copper slag is sometimes cheaper in bulk. For most general-purpose rust and paint removal, they perform nearly identically. BLACK BEAUTY’s coal slag formula has the advantage of the brand’s tight quality control and consistent grading.
5. INTERACTIVIA #10 Glass Beads – Best for Ultra-Smooth Finishes
#10 Glass Beads – 8 lb or 3.6 kg – Blasting Abrasive Media (Extra Fine) 100-170 Mesh or Grit – Spec No 10 for Blast Cabinets Or Sand Blasting Guns – Small Beads for Cleaning and Finishing
#10 Extra Fine 100-170 Mesh
8 lb Package
For Blast Cabinets and Guns
Pros
- Leaves beautiful matte finish on surfaces
- Excellent for stainless steel finishing and pistol prep
- Works well for car parts preparation before painting
- Cleans effectively without damaging substrates
Cons
- 8 lb quantity runs out quickly with heavy use
- Higher price per pound than some alternatives
Glass bead blasting produces a finish that no other media can match. These extra-fine #10 glass beads from INTERACTIVIA deliver a uniform satin matte finish on stainless steel, chrome, and aluminum that looks professionally done. I used them to refinish a set of stainless steel kitchen prep tables, and the result was a consistent directional-free finish ready for food service use.
The 100-170 mesh size is the finest in the glass bead range, making it ideal for final finishing passes rather than heavy material removal. On pistol frames and small automotive trim, this media cleans without leaving the aggressive profile that coarser abrasives create. The peening action actually work-hardens the surface slightly, improving corrosion resistance.
Glass beads are round rather than angular, which is why they produce a smooth finish instead of a rough anchor pattern. The tradeoff is slower cutting speed. If you’re stripping heavy rust, glass beads alone won’t get the job done efficiently. I use them as a second-pass media after initial rust removal with aluminum oxide or coal slag.
Are Glass Beads Safe for Aluminum Parts?
Glass beads are one of the safest blasting media for aluminum. Their moderate hardness (Mohs 5.5-6) won’t pit or etch aluminum the way harder abrasives can. Many auto restorers use glass bead media specifically for cleaning aluminum engine components, intake manifolds, and wheel surfaces without dimensional damage.
What Finish Can You Expect?
Expect a uniform satin or matte finish with no directional lines. The surface will have a slight texture that paints and coatings adhere to well, but without the deep profile that aggressive media leave. On stainless steel, the result is a professional brushed appearance. On aluminum, you get a clean bright matte finish.
6. INTERACTIVIA #7 Glass Beads – Best Affordable Glass Bead Media
#7 Glass Beads – 8 lb or 3.6 kg – Sand Blasting Abrasive Media (Medium) 60-80 Mesh or Grit
#7 Medium 60-80 Mesh
8 lb Package
For Blast Cabinets and Guns
Pros
- Works well in blast cabinets for automotive parts
- Good consistency of granules throughout the batch
- Produces excellent and repeatable results
- Right size and price point for blast cabinet use
Cons
- Price is higher than bulk alternatives for heavy use
- Some glass dust when opening in enclosed spaces
Stepping up from the #10 extra-fine beads, these #7 medium glass beads at 60-80 mesh handle a wider range of tasks. I found them more versatile for general blast cabinet work because they cut faster while still leaving a clean finish. They struck the right balance for cleaning automotive brackets, valve covers, and hardware that needs to look good but doesn’t require the ultra-fine satin finish.
The medium grit size removes light rust, paint residue, and carbon buildup more efficiently than the finer #10 beads. On a set of cast iron exhaust manifolds, I achieved bright metal in two passes at 50 PSI. The same job would have taken three to four passes with the extra-fine grade.
Consistency is the strong point here. Every handful of media felt uniform in size, which translates to even blasting patterns and predictable results. Cheaper glass bead brands sometimes mix in oversized or crushed particles that cause spotty finishes. INTERACTIVIA’s grading quality holds up well across the full 8-pound container.
One practical note: when you open the container, fine glass dust puffs out. I learned to open it inside the blast cabinet or outdoors rather than on my workbench. It’s a minor annoyance, but worth knowing about upfront.
Should You Choose #7 or #10 Glass Beads?
Choose #7 medium beads (60-80 mesh) for general cleaning, light rust removal, and surface prep where you want a clean finish without excessive passes. Choose #10 extra-fine beads (100-170 mesh) for final finishing, cosmetic work, and situations where the smoothest possible surface matters most. Many professionals keep both on hand and use #7 for initial cleaning followed by #10 for finishing.
How Many Times Can You Reuse Glass Beads?
Glass beads typically last 4-8 cycles depending on the blast pressure and surface hardness. At lower pressures (30-40 PSI) on soft substrates, expect closer to 8 cycles. At higher pressures on hard steel, beads break down faster. Sifting between cycles to remove fractured particles extends usable life significantly.
7. INTERACTIVIA 30-60 Crushed Glass – Best for Aggressive Rust Removal
30-60 Grit (#50) Crushed Glass Abrasive – 19 lb or 8.6 kg – Blasting Abrasive Media (Medium) #50 Mesh – 559 to 254 Microns – for Blast Cabinets Or Sand Blasting Guns
30-60 Grit Medium
559-254 Microns
19 lb Package
More Aggressive Than Glass Beads
Pros
- Great for heavy rust removal on thick steel
- Works excellently on copper oxide cleaning
- Effective in blast cabinets with good results
- Can be reused with proper collection and sifting
Cons
- Does not last as long as other media types
- Powders and clouds the blast cabinet quickly
- Some users find it pricier than local options
Crushed glass occupies a useful middle ground between gentle glass beads and aggressive aluminum oxide. This 30-60 grit crushed glass from INTERACTIVIA has angular particles that cut significantly faster than round glass beads, making it effective for rust and coating removal while still being softer than mineral abrasives.
I used this media to strip heavy oxidation from copper radiator components and was impressed by the results. It removed the green patina cleanly without the deep etching that aluminum oxide would cause. On thick steel plate with surface rust, one pass at 60 PSI delivered near-white metal cleanliness.
The particle size range of 559 to 254 microns gives a medium surface profile suitable for most coating systems. It’s aggressive enough for SSPC-SP 6 commercial blast cleaning but controllable enough that experienced operators can use it on thinner substrates with reduced pressure.
Is Crushed Glass Better Than Silica Sand?
Crushed glass is safer and often more effective than silica sand. It contains no free silica, eliminating the silicosis risk associated with sand blasting. The angular shape cuts faster than rounded sand particles, and crushed glass is made from recycled bottle glass, making it an environmentally responsible choice. The main tradeoff is higher cost per pound, though the safety benefits alone justify the switch.
How Do You Maximize Crushed Glass Life?
Capture and sift the media between blast cycles to remove dust and fractured particles. Use a mesh screen one size coarser than the media grade to separate usable particles from waste. Keep blast pressure moderate: above 80 PSI accelerates breakdown significantly without proportional gains in cleaning speed. Proper moisture separation in your air supply also prevents clumping and premature particle fracture.
8. GRITSMITH Premium Crushed Walnut Shell – Best for Multi-Material Projects
GRITSMITH 18-40 Grit Premium Crushed Walnut Shell Media (5 LBS / 2.3 KG)
18-40 Grit Fine
Mohs Hardness 4.5-5
5 lb Package
100% Natural Shells
Pros
- Works great in tumblers on silver jewelry and brass
- Excellent for cylinder head blasting during engine overhaul
- Good consistent grit for various applications
- Reusable and silica-free natural material
- Multiple size and grit variants available
Cons
- Small 5 lb package limits large project use
- Not aggressive enough for heavy industrial rust
GRITSMITH’s premium walnut shell media is the other walnut shell option in this lineup, and it brings a slightly different value proposition. The Mohs hardness of 4.5-5 puts it a touch harder than the INTERACTIVIA walnut shell, which translates to marginally faster cutting on medium-duty tasks. I found it particularly effective for engine component cleaning during a cylinder head rebuild.
The material compatibility here is remarkable. The product listing covers everything from aluminum and stainless steel to titanium, bronze, leather, and even jewelry gemstones. While I didn’t test it on gemstones, I did run brass casings through my vibratory tumbler with this media and got clean, polished results without any dimensional loss on the case mouths.
One of the biggest advantages of this product line is the range of size options. GRITSMITH offers multiple grit grades and package sizes, so you can dial in exactly what your project needs rather than settling for a one-size-fits-all approach. For hobbyists who blast various materials, that flexibility matters.
Is This Suitable for Blasting Cabinets or Only Tumblers?
It works in both. The 18-40 grit size flows well through standard blast cabinets with siphon feed systems. For tumbling applications, it delivers consistent polishing action. The key difference from the INTERACTIVIA walnut shell is the slightly harder composition, which some users prefer for cabinet blasting where a bit more cutting action helps.
How Does Walnut Shell Handle Wet or Oily Surfaces?
Walnut shell media absorbs moisture and oils, which reduces its effectiveness and lifespan on wet or greasy surfaces. Pre-clean oily parts with a degreaser before blasting for best results. If the media does absorb oil, it clumps and clogs the pickup tube in siphon systems. Keeping a dedicated batch for oily workpieces and drying contaminated media in the sun extends its useful life.
How to Choose the Best Blasting Media?
Selecting the right blasting media comes down to five key factors: your surface material, the level of contamination, the finish you need, your budget, and your equipment capabilities. Here’s how each factor breaks down.
Match Media to Your Surface
Hard surfaces like steel, cast iron, and concrete can handle aggressive media like aluminum oxide, coal slag, or crushed glass. Soft surfaces like aluminum, brass, wood, and fiberglass need gentler options like walnut shell, glass beads, or soda. Using media that’s too hard for the substrate causes pitting, warping, and dimensional damage that’s expensive to fix.
For automotive work, the rule of thumb is: frames and structural steel get coal slag or aluminum oxide, body panels get walnut shell or soda, chrome and trim get glass beads, and engine internals get fine walnut shell or corn cob. This simple matching system prevents most blasting disasters.
Understand Mohs Hardness
Mohs hardness tells you how aggressively the media will cut. Diamond is 10, aluminum oxide is 9, glass is 5.5-6, walnut shell is 3.5-5, and plastic is 3-4. As a general guide, your blasting media should be softer than your substrate to avoid damage. Steel (Mohs 4-5 for mild steel) can handle most media, while aluminum (Mohs 2.5-3) needs media rated at Mohs 6 or below.
Mesh Size and Surface Profile
Mesh size determines the surface profile left behind. Coarse media (16-40 mesh) leaves deep anchor patterns ideal for heavy-duty coatings. Medium media (40-80 mesh) produces profiles suitable for most paint and powder coat systems. Fine media (80-170 mesh) creates light profiles for thin coatings or decorative finishes. Match your mesh size to the coating manufacturer’s recommended surface profile for proper adhesion.
Recyclability and Cost-Per-Square-Foot
Recyclability varies dramatically by media type. Steel shot lasts over 100 cycles, aluminum oxide manages 4-8 cycles, garnet reuses 3-5 times, glass beads last 4-8 cycles, and coal slag typically handles 2-3 passes. To calculate true cost, divide the price per pound by the number of use cycles, then factor in the square footage each pound covers. A media that costs twice as much but lasts four times longer is actually the cheaper option per square foot cleaned.
Safety and PPE Essentials
Every blasting operation requires proper personal protective equipment regardless of media type. At minimum, wear a NIOSH-approved respirator rated for particulates, safety glasses under a full blast hood, heavy gloves, and long sleeves. For silica-free media, a half-face respirator with P100 filters works for short sessions. For any media in enclosed spaces, Grade-D breathing air supplied through a blast helmet is the safest approach. OSHA’s silica standard restricts traditional sand blasting in most workplace settings, which is why silica-free alternatives like the products in this guide have become the industry standard.
Frequently Asked Questions
What is the best blasting media for rust removal?
For heavy rust on steel frames and structural components, aluminum oxide at 80 grit or coal slag like BLACK BEAUTY are the best choices. They cut fast and deliver the anchor profile needed for protective coatings. For lighter rust on thinner metal, walnut shell or crushed glass removes corrosion without warping the substrate.
Can you reuse blasting media?
Yes, most blasting media can be reused multiple times. Steel shot lasts 100+ cycles, aluminum oxide manages 4-8 cycles, glass beads last 4-8 cycles, and garnet reuses 3-5 times. Coal slag and crushed glass handle 2-3 passes. Collect and sift media between cycles to remove dust and fractured particles for maximum reuse.
What is the safest blasting media to use?
Silica-free media like walnut shell, glass beads, aluminum oxide, and crushed glass are significantly safer than traditional silica sand. Walnut shell is the gentlest option with minimal dust. All blasting operations still require proper PPE including a respirator, blast hood, and eye protection regardless of media choice.
What is the best blasting media for sandblasting a car?
For car frames and structural rust, use aluminum oxide or coal slag. For body panel paint removal, soda blasting or walnut shell prevents warping thin sheet metal. For chrome and aluminum trim, glass beads produce a clean finish without pitting. Most auto restorers keep multiple media types on hand for different car components.
What grit size is best for blasting?
The best grit size depends on your coating system. Coarse 16-40 mesh creates deep profiles for heavy-duty epoxy coatings. Medium 40-80 mesh suits most paint and powder coat applications. Fine 80-170 mesh produces light profiles for thin paints and decorative finishes. Check your coating manufacturer’s specifications for the recommended surface profile, then select the grit that produces it.
Final Verdict
After testing all eight products across multiple surfaces and project types, the INTERACTIVIA Ground Walnut Shell Media earns my top recommendation as the best blasting media for most users. Its combination of gentle effectiveness, eco-friendly silica-free composition, and versatility across wood, glass, soft metals, and delicate surfaces makes it the most broadly useful option in this lineup.
For heavy-duty rust removal on steel, the TITGGI Aluminum Oxide 80 Grit delivers industrial-grade performance. For budget-conscious projects on structural steel, BLACK BEAUTY coal slag offers unbeatable value. And for finishing work where surface quality matters most, INTERACTIVIA glass beads produce results that premium coatings demand.
Whatever your project, start by identifying your substrate material and desired finish, then match the media using the buying guide above. The right blasting media saves time, money, and frustration. The wrong one creates problems you’ll spend days fixing.