Laser etch and stamped markings provide readability and permanence, Non-slip surface treatment, Drive Size: 3/8 in, Finish: Black Oxide, Type: Socket Sets, Includes: Blow Mold Case, Material: Steel, Measuring System: Inch/Metric, No, of Points: 6, Opening Size: 5/16 in, 3/8 in, 7/16 in, 1/2 in, 9/16 in, 5/8 in, 11/16 in, 3/4 in, 13/16 in, 7/8 in, 15/16 in, 1 in, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, SKU: ORSNO64820