4" Abrasive Filament Nylon Bristle Cup Brush - 5/8" 11 Thread, 1/4" Hex Drill Shank Arbor, Coarse Grit Angle Grinder Brush for Truck Bed Liner Surface Prep, Sanding, Rust & Paint Removal

Durable and effective

Did a great job

I mis used this plastic cup brush on a dewalt 20v right angle grinder, it worked as good as I expected for cleaning the corrosion on aluminum , one caveat , the bristles will flare out with prolonged high RPM use

This this is hands down the way to go for bedliner prep. So much faster than using any sander. You can use with grinder, But if your grinder is not variable speed I 100% suggest using one that is or a variable speed drill. It will 100% eat up paint to the metal. But at lower speeds is were it really shines and I 100% suggest to use it at. I was able to get a 5'7 bed 100% prepared in just a couple hours. I wish I had this when I bedlined my other truck. Easy to use. The bristles are in great shape still. If I ever need anther I'll buy it hands down.

If you have anything that needs cleaning to prep for painting, cleaning cast iron pots for re-seasoning, and scuffing paint for spraying rhino - liners, this is the absolute perfect tool to use.

It's ok not all cracked up to be . Maybe on light projects it would be great

I used this while restoring an old wrought iron bench. It did a great job removing rust and grime in all the grooves and holes. Very durable. I used it hard over a course of about 3 hours and it didn't phase it a bit. I expect this thing to last a long time. Exceeded my expectations.

The cup brush seems to be made well. It fit good on my 4-1/2" Milwaukee angle grinder. It performed as expected. I would recommend this product when you need a less aggressive cup brush.

Used it for roughing up the paint in a truck box to spray boxliner a real time save

This was great for sounding down my box of my truck I did use a grinder I suggest not using that but to use a drill instead and hold on tight LOL but sanded down the whole inside of my box very quickly and did a good job

Bristles aren't very stiff. They end up fanning out and you need to hold the grinder at an angle to use. 2 stars because it does work but not in the intended way.

If the bristles would not be cut off so prematurely by the sharp edge of the brush cup, it may endure longer. Rounder cup edge Lower cup angle Steel wire encased nylon bristles in the portion of the bristles crimped in the cup.