2 Inch Bristle Disc,6 Pieces Roloc Bristle Disc Grade - 120# 80# 50# Grit Abrasive Coating Removal Disc for Metal with 1/4 Inch Shank Attachment

I purchased one 3M brand from NAPA auto parts and it worked great (120 grit - white) but was too fine and taking too long. I also purchased these which included 2 white (120 grit), 2 yellow (80 grit), and 2 green (50 grit). After using the Green from this set, they both wore out and didnt clean as good as the 3M white one from NAPA. I actually went through 1 white, 1 yellow, and 2 green, and STILL had to go over everything with the 3M white from NAPA to clean it all up. That 1 outlasted 4 of the more course grit sanding discs from this kit, and it is supposed to be the finer grit! I am requesting a full refund as my project is not done and now will be purchasing the actual 3M discs to finish my project (2 heads and engine block head mating surface).

I like that they remove the gaskets on aluminum heads and blocks

I purchased these to clean up weldspatter as a machine builder. These are garbage.