CRESCENT® Socket, System of Measurement: Imperial, Hex Tip, 1/4 in Drive, 5/16 in Socket, Deep Length, 2 in Overall Length, 0.8 in Opening Depth, 0.45 in Drive End Width, 0.45 in Socket End Width, 6 Points, 0.21 in Bolt Clearance, Alloy Steel, Finish: Full Polished Chrome