Use on angle grinder for fast removal of heavy rust corrosion and spatter. Use to clean weld beads, angle weld, and corners in tight places. For roughening, deburring, and surface cleaning prior to welding. 3" knotted cup brush . Direct spindle mount on angle grinder. For fast removal of heavy rust, corrosion, weld scale, and spatter. Ideal for tight operations, corners, and angle welds. Wire size: .020. Maximum speed 14,000 RPM.