Armstrong Drive Socket, Standard Length, Measurement System Imperial, 1/2 in Drive, Square Drive, 12 Point Socket, 19/32 in Socket, 1.455 in Overall Length, 0.86 in Drive End Width, 0.86 in Socket End Width, 3/8 in Bolt Clearance Depth, 0.45 in Opening Depth, Ball Locking, High Alloy Steel, Chrome Plated