Surface-Conditioning Disc Mandrel Abrasive Mounting Connector Size 1/4 in Abrasive Mounting Connector Type Unthreaded Hole Tool Mounting Connector Size 1/4 in Tool Mounting Connector Type Straight Shank Overall Length 2 1/2 in Product Type Surface-Conditioning Disc Mandrel Outside Flange Diameter 1 1/2 in Compatible Wheel Diameter (Maximum) 6 in Compatible Wheel Diameter (Minimum) Not Applicable Compatible Wheel Thickness (Maximum) 1/2 in