Features 1. High-quality chrome vanadium steel materials provide increased torsion and superior hardness. 2. Hardened chrome vanadium steel socket enhances rotation power and reduces wear. 3. Resistant to rust and corrosion, ensuring durability and long service life. 4. Drill bit end features precise chamfering for smooth and easy insertion. 5. Socket size markings allow for quick and easy identification. Specification Item Type: Wrench Socket Bit Material: Chrome-Vanadium Steel Toolbox Color: Blue Toolbox Size: Approx. 220 x 113mm / 8.7 x 4.4in Square Wrench Drive Size: 3/8in Hex Bits Specifications: T25, T30, T40, T45, T50, T55, T60 Bits Total Length: Approx. 110mm / 4.3in Quantity: 7pcs/set Suitable for: 3/8in square wrench drive, air impact wrench, power rod, etc. Application: Household, automobile, and similar uses Package List 7 x Bits 1 x Tool Box