Armstrong Drive Socket, Deep Length, Measurement System Imperial, 1/2 in Drive, Square Drive, 6 Point Socket, 1-1/8 in Socket, 3.235 in Overall Length, 1.49 in Drive End Width, 1.49 in Socket End Width, 1.053 in Bolt Clearance Depth, 1.7 in Opening Depth, Ball Locking, High Alloy Steel, Chrome Plated