Nut Lock-Type Wheel Adapter, Abrasive Mounting Connector Size 1/2 In.-13, Abrasive Mounting Connector Type Threaded Hole, Tool Mounting Connector Size 1/4 in, Tool Mounting Connector Type Straight Shank, Overall Length 2 9/16 in, Product Type Nut Lock-Type Wheel Adapter, Outside Flange Diameter 1 1/2 in, Compatible Wheel Diameter (Maximum) 3 in, Compatible Wheel Diameter (Minimum) 2 in, Compatible Wheel Thickness (Maximum) 5/8 in