Armstrong Drive Socket, Standard Length, Measurement System Metric, 3/4 in Drive, Square Drive, 12 Point Socket, 24 mm Socket, 1.969 in Overall Length, 1.39 in Drive End Width, 1.39 in Socket End Width, 0.752 in Bolt Clearance Depth, 0.626 in Opening Depth, Ball Locking, High Alloy Steel, Chrome Plated