Feature:1. The hardened chromevanadium steel socket improves the rotation efficiency and can effectively reduces wear.2. The end of the drill bit with precise chamfer can be inserted smoothly, and the size is printed on the socket for easy access.3. It has complete anti-rust and corrosion resistance, is not easy to be damaged, and does not need to be replaced frequently.4. It is made of highquality steel, quenched at high temperature, sturdy and durable, with strong torgue.5. Package including a whole set of tool, and everything you need is provided.Specification:Item Type: Hex Bit Socket SetMaterial: Chrome-Vanadium SteelToolbox Color: BlueSquare Wrench Connector Size: Approx. 1/2in/12.5mmHex Socket Bit Specifications: H5-H6-H7-H8-H10-H12-H14-H17-H19 (Length: Approx. 55mm/2.2in)H5-H6-H7-H8-H10-H11-H12-H13 (Length: Approx.100mm/3.9in )H5-H6-H7-H8-H10-H12-H14 (Length: Approx. 140mm/5.5in )H5-H6-H7-H8-H10-H12 (Length: Approx. 200mm/7.9in )(Manual measurement may have a deviation of 1-2 mm)Fitment: 1/2 inch square wrench interface/air wrench/power rod, etc.Application: Household, automobile, etc..Package List:30 x Hex Bit Socket1 x Tool BoxNote:Please allow 12mm difference due to manual measurement.