Armstrong Impact Power Socket, Deep Length SAE Thin Wall, 3/8 in Socket, 1/4 in Drive, Squared Drive, 1.94 in Overall Length, 6 Points, 0.55 in Drive End Width, 0.55 in Socket End Width, 0.344 in Bolt Clearance Depth, 0.95 in Opening Depth, High Alloy Steel, Black Oxide