MAGBIT 735.0516 MAG735 5/16-Inch by 17-Inch Regular Duty Ship Auger Bit High grade steel 1045 carbon steel for a longer life Quick change 7/16-Inch hex shank for use in quick change chucks or standard chucks Quick change shank save time when changing bits, fits in MAG782 quick change extension self feeding screw point for faster hole starts and easier cutting Machined on a true center to minimize run out and reduce fatigue