Port Tool, Shank Type Straight Shank, 884, Number of Pieces 1, Number of Flutes 4, Pilot Dia. 0.937 In., Shank Dia. 0.250 In., Shank Length 0.875 In., Overall Length 2.813 In., High Speed Steel, Bright Finish, Alloy Steel, Carbon Steel, Cast Iron, Aluminum, Copper Alloys, Meets/Exceeds ANSI, Sizes Included 15/16 In.