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