IVY Classic 46213 13/16 x 7-1/2-Inch Power Auger, High-Carbon Steel, 1/Tube Designed to cut holes in plywood, hard wood and soft wood, Swift Bore (Registered Trademark) 3/8-Inch hex shank for secure chuck grip Features a sharp spur for smooth holes and a self-feeding screw point Heat-treated and tempered high-carbon steel Diameter: 13/16-inch, Length: 7-1/2-inch, Shank: 3/8-inch hex