Shorter for better access to tight spaces between studs and joists, will drill 2 ft and 4 ft joists. Self-feeding screw point draws bit through all wood types. Replaces special tools such as right angle drills and eliminates multiple steps to cut the hole to size. Overall length 4.5 in (144 mm) weight 0.3 lb. (118 g). 1/4 in hex. Over center single flute design for cleaner holes and less splintering. Marked with bit diameter and catalog number on shank for easy identification. Not for use in wood with nails.