Depressed Center Wheels, Abrasive Wheel Type Type 27, Abrasive Wheel Diameter 4 1/2 in, Thickness 0.25 in, Arbor Hole Size 7/8 in, Abrasive Material Aluminum Oxide, Abrasive Grit 24, Max. RPM 13, 300 RPM, Series A24R, Grade Very Coarse, Application Ferrous Metal. This item has been restricted from sale in the following state (s): []