ZFE 10Pcs Dia 25mm Deburring Flap Sanding Polishing Burr Point Wheel -1/4" (6mm) Shank For Die Grinder Pack Of 10Pcs Work smoothly and provide uniform surface treatment effect.Sharp cutting, high grinding force, wear resistance. Suitable for the polishing of metal and non-metallic surface,Installed in electric drill, high power grinder. For polishing, trimming, molding of furniture, artware, mold, and a variety of model aircraft and metal This product is suit for Metal,stainless steel, copper and iron The shank diameter:1/4" (6mm)