CRESCENT® Socket, System of Measurement: Imperial, Hex Drive, 3/8 in Drive, 5/8 in Socket, Standard Length, 0.98 in Overall Length, 0.53 in Opening Depth, 0.78 in Drive End Width, 0.78 in Socket End Width, 12 Points, 0.562 in Bolt Clearance, Alloy Steel, Finish: Full Polish Chrome