Threaded Shank Adapter, Abrasive Mounting Connector Size 1/4 In.-20, Abrasive Mounting Connector Type Threaded Shank, Tool Mounting Connector Size 1/4 in, Tool Mounting Connector Type Straight Shank, Overall Length 9 7/8 in, Product Type Flap Wheel Threaded Shank Adapter, Compatible Wheel Diameter (Maximum) 3 in, Compatible Wheel Diameter (Minimum) 1 in, Compatible Wheel Thickness (Maximum) 1 in, Compatible Wheel Thickness (Minimum) 1/4 in