A crimped steel wire circular brush designed for light to medium duty applications such as cleaning metal surfaces prior to welding or painting. Fitted with a 6.5mm (1/4in) shank & are designed to operate with power tools with a maximum of 4, 500rpm. Type: Circular Diameter: 100mm Shaft: 6mm (1/4in) Wire: 0.3mm crimped steel wire Conforms to ISO9001. & DIN EN1083-1 & 2