Faithfull X-LOCK Conical Wire Brush is used for heavy-duty applications. Twist knot brushes are suitable for the removal of slag, rust, scale or even dried cement from welds, edges and grooves. For use on steel surfaces, aluminium and non-ferrous metal surfaces. Featuring the X-LOCK quick change system, ensuring a fast, reliable and effective one click change between tools when used with a compatible angle grinder. Specifications: Wire Type: Twist Knot Steel. Diameter: 115mm. Fitting: X-LOCK. Wire Size: 0.5mm. Max. RPM: 12500. Technical Specs Wire Type: Twist Knot Steel Diameter: 115mm Fitting: X-LOCK Wire Size: 0.5mm Max. RPM: 12500