Ideal for cleaning prior to welding, removing paint or rust and general metal preparation prior to painting Features: Twisted and crimped wire bristles give added strength and toughness to brushes Fits any Angle Grinder with an M14 thread Hardened Steel Spiral Material: Steel Wire & Alloy Metals Specification: 2 x 75mm -3" diameter Wire Cup Brush 2 x 100mm - 4" diameter Wire Semi-Flat Wheel Brush Mounting Type Arbor: M14 x 2 Internal thread Max Speed RPM: 12,500 Cup Brush Max Speed RPM: 12,500 Semi-Flat Wheel Brush