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, etc. Package List 7 x Bits 1 x Tool Box Please allow 12mm error due to manual measurement. Thanks for your understanding. 1Highquality chrome vanadium steel materials, increased torsion and offers unparalleled hardness. 2The hardened chrome vanadium steel socket improves the rotation power and reduces wear. 3With complete resistance to rust and corrosion, which is not easy to be damaged, long lifespan. 4The end of the drill bit is designed with precise chamfering, which can be inserted smoothly and conveniently. 5The size is printed on the socket for easy and fast identification, bring much convenience for you.