Flat Head Wheel Arbor Abrasive Mounting Connector Size 3/8 in Abrasive Mounting Connector Type Unthreaded Hole Tool Mounting Connector Size 1/4 in Tool Mounting Connector Type Straight Shank Overall Length 1 3/4 in Product Type Flat Head Wheel Arbor Outside Flange Diameter 3/4 in Compatible Wheel Thickness (Maximum) 3/8 in Compatible Wheel Thickness (Minimum) Not Applicable Maximum Operating Speed Not Rated