Faithfull FAIWBT80 Wire Cup Brush Twist Knot 80mm M14 x 0.50mm Steel Wire Designed for use with angle grinders with a compatible thread and are suitable for industrial use and more specialist applications. Twist knot wire brushes are suited to heavier duty applications such as the removal of slag rust scale or even dried concrete. Wire: High tensile twisted steel Type: Cup Face Diameter:80mm Thread: M14 x 2 Wire: 0.5mm Conforms to ISO 9001 and DIN EN1083-1 and 2 Maximum rpm 8500