Abrasive Cut-Off Wheel Abrasive Material Aluminum Oxide Grit 60 Connector Size 1/4 in Connector Type Unthreaded Hole Overall Diameter 4 in Overall Thickness 0.035 in Compatible Tool Type Die Grinder Primary Material Applicationn Cast Iron Steel Series Carbo Gold Wheel Type Type 1 Maximum Operating Speed 19 100 RPM Reinforced Status Reinforced Bond Type Resin