CRESCENT Socket, System of Measurement: Metric, Hex Tip, 3/8 in Drive, 13 mm Socket, Standard Length, 1 in Overall Length, 0.53 in Opening Depth, 0.74 in Drive End Width, 0.74 in Socket End Width, 12 Points, 0.275 in Bolt Clearance, Alloy Steel, Finish: Full Polished Chrome