Countersink Set, Single Ended, Number of Pieces 7, Number of Flutes 6, Included Angle (Deg.) 90, Cutting Capacity (In.) -, Pilot Dia. (In.) -, Pilot Length (In.) -, Shank Dia. (In.) -, Shank Length (In.) -, Overall Length (In.) -, High Speed Steel, Uncoated Finish, Heavy Duty For Aluminum, Alloy, Carbon And Tool Steels And Non-Metallics Where Finish Is Not A Priority, Sizes Included 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 1 In.