Irwin 87912 IRWIN SPEEDBOR Short-Length Spade Drill Bit, 3/4-Inch x 4-Inch length (87912)

For use with sheet metal screws and other hexagonal head fasteners. Standard six-point design. Magnetic. 3 Piece Bag. Overall Length: 2-9/16". Shank Body: 3/8". Shank Diameter: 1/4". Hex Drive: 7/16". Socket Body Dia.: 5/8".