Self-feeding spade bits, 6pcs. Bore hardwood, softwood, plywood and drywall. Innovative self-feeding design requires less effort and reduces vibration. Unique tapered design allows existing hole enlargement. 1/4 inch quick change hex shank. Forged and heat treated for long life. For use in 1/4 inch (6.4 mm) or larger power drills. Hole in top center of bit for wire pulling.P.O.P. Packaged.