Arbor Hole Shank Adapter, Abrasive Mounting Connector Size 5/8 in, 1 in, Abrasive Mounting Connector Type Unthreaded Hole, Tool Mounting Connector Size 1/4 in, Tool Mounting Connector Type Straight Shank, Overall Length Not Applicable, Product Type Flap Wheel Unthreaded Arbor Hole Adapter, Compatible Wheel Diameter (Maximum) 8 in, Compatible Wheel Diameter (Minimum) 4 in, Compatible Wheel Thickness (Maximum) Not Applicable, Compatible Wheel Thickness (Minimum) Not Applicable