CRESCENT® Socket, System of Measurement: Imperial, Hex Tip, 3/8 in Drive, 1/4 in Socket, Deep Length, 2-1/2 in Overall Length, 0.35 in Opening Depth, 0.67 in Drive End Width, 0.45 in Socket End Width, 6 Points, 0.15 in Bolt Clearance, Alloy Steel, Finish: Full Polished Chrome