The deep, open-throat design of the Ship Auger bit clears chips for faster, cleaner cuts. The shank is 7/16-Inch hex to fit 1/2-Inch (13 mm) and larger three-jaw chucks. Used for heavy construction and repair work in mines, on docks and bridges as well as electrical work.Features Head and twist are ground to correct clearance for easy removal from hole Feed-screw pilot draws bit into wood Full length is heat-treated and tempered Special bit steel with machine-ground flutes and polished edges for smooth, wobble-free boring Bits drill through nails, wood, vinyl, plastics, and heavy timber For heavy construction and repair work in mines, on docks and bridges as well as electrical work Warnings Always ensure that you and persons in the vicinity wear approved eye protection. Never use on or near live electrical circuits. Bit Diameter: 7/8 in (22 mm) Overall Length: 6 in (15.2 cm) Twist Length: 4 in (10.2 cm) Weight: 0.5 lbs Shank Diameter: 0.4 in Depth: 6 in Width: 1 in Height: 1 in Country of Origin: Taiwan DownloadsVideo DownloadSpec Sheet