DOMORE These discs are polishing discs with button on reverse side. The button allows the disc to be changed quickly without using special tools. It is extremely well for removing paints, rust, corrosion, exit burrs, weld splatter, etc. Diameter Grit Max. Speed(r/m) Type 1" Coarse Medium Fine 30000 R 1-1/2" Coarse Medium Fine 30000 R 2" Coarse Medium Fine 30000 R 3" Coarse Medium Fine 25000 R