Wire Brush Set 5pc Brassed - Suitable for use with power tools up to the maximum rated speed (4500rpm). - Shaft: 6mm. - Contents: Brushes; Wire Cup; 50mm, 75mm, Flat Wire; 50mm, 75mm, 25mm Decarbonising/Cleaning Wire. - Crimped brassed steel filaments add extra rigidity and cleaning power. Contents: Brushes; Wire Cup; 50mm, 75mm, Flat Wire; 50mm, 75mm, 25mm Decarbonish/Cleaning Wire Shaft Diameter: 6mm