3M 31408 Green Corps Roloc 3" 24 Grit Disc Grade 24 Heavy Duty Cloth Backed Abrasive Disc for Paint and Metal Grinding Applications Used for hard to reach areas to remove paint and/or rust and grind welds and metal 3M Roloc Attachment system for easy 1/4 turn quick change of grinding discs. Fits any standard 1/4 in drill or air tool Ideal for Body Work