High carbon knotted steel wire, Medium bristles, For use with grinding machines, Ideal for preparation and cleaning of metal surfaces, cleaning of welds, removal of scale, rust, corrosion, etc., Diameter: 4" (101.6mm), Thickness: 5/8" (15.8mm), Wire Thickness: 0.35mm, Anchor Hole Size: , M14, Wire Length: 28mm, No. Of Braids: 22, Maximum Speed: 8,500rpm