Create a clean surface on 300 and 400 Series stainless steel and other tough metals with this coarse grit quick change disc on a right angle grinder Made with a 100% ceramic alumina grain, this quick change sanding disc cuts faster and lasts longer than blended or low-ratio ceramic alumina discs Advanced self-lubricating grain treatment provides coolest cut and significantly faster cut rates; coarse grit provides fast stock removal, weld blending, and deburring rates This 3 inch quick change disc uses a TR Type III roll-on/roll-off plastic attachment system Each box contains 25 sanding discs; each disc is 3" in diameter