Abrasive Cut-Off Wheel Grit 60 Connector Size 1/4 in Connector Type Unthreaded Hole Overall Diameter 4 in Overall Thickness 0.04 in Compatible Tool Type Die Grinder Primary Material Applicationn Aluminum Brass Cast Iron Copper Nickel Alloy Stainless Steel Steel Series Cut-Off Wheel Wheel Type Type 1 Maximum Operating Speed 19 000 RPM