High carbon knotted steel wire, Medium bristles, For use with grinding machines, Ideal To remove rust, paint residue and polish metal objects, Diameter: 6" (152.4mm), Thickness: 11/16" (17.4mm), Wire Thickness: 0.35mm, Centre Hole Size: 5/8" (15.8mm), Wire Length: 30mm, No. Of Braids: 30, Maximum Speed: 8,000rpm