Unitized Wheel Mandrel, Abrasive Mounting Connector Size 3/16 in, Abrasive Mounting Connector Type Unthreaded Hole, Tool Mounting Connector Size 1/4 in, Tool Mounting Connector Type Straight Shank, Overall Length 2 1/16 in, Product Type Unitized Wheel Mandrel, Outside Flange Diameter 3/4 in, Compatible Wheel Diameter (Maximum) 1 in, Compatible Wheel Diameter (Minimum) Not Applicable, Compatible Wheel Thickness (Maximum) 1 in, Compatible Wheel Thickness (Minimum) Not Applicable