Laser etch and stamped markings provide readability and permanence, Non-slip surface treatment, Drive Size: 1/2 in, Finish: Black Oxide, Type: Socket Sets, Includes: Blow Mold Case, (1) Universal Joint 3 in, , (2) Extensions: 3 and 5 in, Material: Steel, Measuring System: IMetric, No, of Points: 6, Opening Size: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 24 mm, 26 mm, 27 mm, SKU: ORSNO64828