The Mercer 6941414 is a 1/4-Inch Arbor x 1/4-Inch Shank Mandrel. Features: * Slotted screw heads * Screws are case hardened * Machined from alloy steel * Single piece packed in plastic bag What"s In the Box: * Mercer 6941414 1/4-Inch Arbor x 1/4-Inch Shank Mandrel