1High?quality 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. 7 x Bits 1 x Tool Box Item Type: Wrench Socket Bit_x000D_Material: Chrome-Vanadium Steel_x000D_Toolbox Color: Blue_x000D_Toolbox Size: Approx. 220 x 113mm/8.7 x 4.4in_x000D_Square Wrench Drive Size: 3/8in_x000D_Hex Bits Specifications: T25, T30, T40, T45, T50, T55, T60_x000D_Bits Total Length: Approx. 110mm/4.3in_x000D_Quantity: 7pcs/set_x000D_Suitable for: 3/8in square wrench drive/air impact wrench/power rod, etc._x000D_Application: Household, automobile, etc. 1High?quality 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. 7 x Bits 1 x Tool Box