Armstrong Drive Socket, Deep Length, Measurement System Imperial, 1/2 in Drive, Square Drive, 6 Point Socket, 1 in Socket, 3.235 in Overall Length, 1.037 in Drive End Width, 1.037 in Socket End Width, 0.87 in Bolt Clearance Depth, 1.3 in Opening Depth, Ball Locking, High Alloy Steel, Chrome Plated