3M 048011-18730 3M-18730 Roloc Bristle Disc Grade-50, Size-2, Green

i dont usually like leaving bad reviews but this grinder cookie is pathetically expensive for what it is and the listing says that it comes in a set of 2 and i only received one. i use these things to clean up mating surfaces for engine components and go through then extremely fast. amazon doesnt have an option for hey half of what i ordered here is missing so im not sure what to do about it. buy at your own risk

Used it to clean gasket surface from an engine. Reviews here say its good, Youtube channels recommend it, so I gave it a try. Cleaned everything off, metal looked and felt smooth to the touch, rebuilt the engine with a compression of 5-10 psi. Thats it. Engine is toast. Everything is torqued to spec, head gasket and head bolts are new. This isnt even my first rebuild, I thought Id save some time using this method rather than the method of soaking in solvent, waiting, repeat process.

Did not work at all for sanding detail on a table I was refurbishing... not sure what a good application would be.

Great bristles they are graduated as they go into the center. This is heavy duty and has held up the shops abuse so far (it is a lot) They also handle delicate work that a rougher sandpaper would not be able to do I love these and they last and last a must have for any shop