Feature: 1. Made of high quality chrome‑molybdenum steel for impeccable rust‑proof and anti‑corrosion properties, has high hardness. 2. Hardening treatment for better durability, improves the rotation power and reduces wear. 3. Manufactured with meticulous care, increases torsion for better working performance and efficiency. 4. Drill bit with precise chamfer can ensure smooth inserting, and the printed size information on the socket can helps you get a quick recognition. 5. Perfect hand tool for professional businessmen, mechanics or DIY enthusiasts, easy to carry out with the tool box. Specification: Item Type: Socket Screwdriver Bit Set Material: Chrome-Molybdenum SteelBit Color: BlackTotal Height: Approx. 78mm/3.1inBit Diagonal Size: T30: Approx. 4.70mm/0.19in T40: Approx. 6.20mm/0.24in T45: Approx. 7.90mm/0.31in T50: Approx. 8.60mm/0.34in T55: Approx. 9.60mm/0.38in T60: Approx. 12.7mm/0.50in T70: Approx. 15.2mm/0.60in T80: Approx. 17.2mm/0.68in T90: Approx. 19.5mm/0.77in T100: Approx. 20.8mm/0.82inSquare Socket Interface Size: Approx. 1/2inApplication: Suitable for any air impact/power bar, etc. with 1/2in square drive interfaceRepair tool for home, automobile, etc.. Package List: 10 x Socket Bit1 x Blue Tool Box