Specification Material:brown corundum Shaft Diameter: 3mm Features 1.Used in grinding and polishing surfaces of metal,wood,plastic ect.Can give a uniform finish. 2.These flap wheels are the perfect abrasive for rust removal, paint removal,deburring, flash,stripping residue or scale removal, blending.Designed to polishing in hard to reach places, such as tubing or piping. 3. Small buffing wheel is an efficient polishing tool, with small, high efficiency, low cost,good wear resistance, durable and practical. 4.Flap wheels diameter:31.5mm/16mm/20mm/12mm/10mm.Shanks are 1/8 inch (3mm ).