Armstrong Impact Socket, SAE Standard Length, 1-1/16 in Socket, 1 in Drive, Squared Drive, 2-3/8 in Overall Length, 6 Points, 2-1/8 in Drive End Width, 1.077 in Socket End Width, 0.703 in Bolt Clearance Depth, 0.656 in Opening Depth, High Alloy Steel, Black Oxide