Product Description 7/16” Turbomax Drill Bit is manufactured from quality materials combined with a strong construction providing dependable, long lasting use. Features a self starting tip and 3/8" reduced shank with three flats on the shank. Ideal for a variety of general purpose applications. Product is sold carded. From the Manufacturer TurboMax Straight Shank Drill Bit, is 7/16-inch diameter, 3-pack. The Irwin TurboMax revolutionary Jet Point tip stays sharper longer. Independent tests show TurboMax drills almost twice as many holes as Bullet and nearly 1-1/3-times more holes than Sidewinder. Irwin tools are made of only the finest materials, manufactured to exacting tolerances.