Armstrong Drive Socket, Deep Length, Measurement System Imperial, 1/2 in Drive, Square Drive, 6 Point Socket, 1-1/2 in Socket, 3.218 in Overall Length, 2 in Drive End Width, 2 in Socket End Width, 1.06 in Bolt Clearance Depth, 1-1/8 in Opening Depth, Ball Locking, High Alloy Steel, Chrome Plated