Armstrong Impact Socket, SAE Standard Length, 15/16 in Socket, 3/4 in Drive, Squared Drive, 1-7/8 in Overall Length, 8 Points, 1-5/8 in Drive End Width, 1.813 in Socket End Width, 0.671 in Bolt Clearance Depth, 0.594 in Opening Depth, High Alloy Steel, Black Oxide