Nut Lock-Type Wheel Adapter Abrasive Mounting Connector Size 3/8 In.-24 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 in Compatible Wheel Thickness (Maximum) 5/8 in