This Faithfull crimped steel Wire Circular Brush is designed for light to medium-duty applications such as cleaning metal surfaces prior to welding or painting. Fitted with a 6mm (1/4in) shank and designed to operate with power tools up to a maximum of 4,500/min. Shaft 6mm (1/4in). Wire 0.30mm crimped steel wire. Conforms to ISO 9001 and DIN EN1083-1 and 2 standards.