Professional tool for commercial or occasional use High quality oxide grit bonded to Hook/Loop back paper Long life and excellent anticlogging characteristics Suitable for a number of uses including on paint, wood, metal, plastic etc Suitable for all 2" / 50mm Sanders whether air or electric Diameter of the discs 2" / 50mm No holes in the disc. Hook/Loop 2" sanding discs Grit - 40 grit This listing is for a pack of 100 discs.