Armstrong Drive Socket, Standard Length, Measurement System Imperial, 3/4 in Drive, Square Drive, 12 Point Socket, 2-1/16 in Socket, 3.015 in Overall Length, 1.948 in Drive End Width, 2.73 in Socket End Width, 2.06 in Bolt Clearance Depth, 1.6 in Opening Depth, Ball Locking, High Alloy Steel, Chrome Plated