3M 3M-18733 Roloc Bristle Disc Grade - 120, Size - 2

Don't cheap out with these! In the long run they are worth it. I use these soft bristles for use on aluminum sealing surfaces on vehicles (aluminum heads, blocks etc). They do not take off much metal if any at all and does not leave any gouges/scratches.

Genuine 3M product. They work as they should

It looks like and performs genuine 3M product. It’s not too aggressive it just right to remove old gasket from engine block. Would definitely purchase again

It looks like these are 3M knockoffs but they cleaned up the cylinder heads nicely. They worked fine.

These worked great for prepping my aluminum intake manifold for re-gasketing.

Awesome Product. Better than I thought.

My cylinder head gasket failed on my '04 Altima, and I needed something to clean up the mating surfaces that had residual RTV on them. Instead of going to try to tested route of using razor blades, I opted to look for something more easy. In addition, razor blades can leave scratches that you eventually have the buff out, as they can affect mating services.I don't have an air tool but these work just fine using a regular cordless drill. I also purchased the attachment head onto which these spin on. I would probably look for a lighter grit because these did leave some swirl marks in the aluminum even though I tried to be as careful as possible. Aside from that, I sure I'll find more uses for them and I could see them working especially well on steel surfaces.

Great value for the money, high quality, and works very well. Easy to use and last a long time!