Abrasive -Off Wheel, Abrasive Wheel Type Type 1, Abrasive Wheel Diameter 4 in, Thickness 0.045 in, Arbor Hole Size 5/8 in, Abrasive Material Aluminum Oxide, Abrasive Grit 46, Max. RPM 15,280 RPM, Series Gemini Right , Diamond Knockout No, Application Ferrous Metal, Gray Iron, Stainless