Ideaful to remove welding burs,paints,rust Quick fitting, safe for users Reliable quality, long life Wheel brushes with shank specifications: 1) Diameter: 40,50,65, 75, 100mm2)shank:6mm3) Material:a) S: gray carbon steel wire crimped: Φ0.30, 0.35mmb) BS: brass coated steel wire crimped: Φ0.30mmc) SS: stainless steel wire: Φ0.22, 0.30, 0.35, 0.50mmd) ST: Knotted steel wire: Φ0.35, 0.5mm