Bits made of premium S2 alloy steel for superior hardness and insure longevity,Cr-V steel sockets provide superior torque for greater turning power. 3/8 Inch Drive Long Hex Bit Socket Set Include: (SAE)1/16", 1/8", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8", 7/16", 1/2". Extra-long design allow bit to reach deep into especially narrow, recessed areas。 Insert smoothly with precision chamfered bit ends. Large, clear die-stamped size marking is easy to read and can’t wear off. Come with a heavy duty blow molded storage case, easy to carry. Meets or exceeds ANSI performance standards. It comes with 1 year quality warranty. The CASOMAN 10 Pieces 3/8 Inch Drive Long Hex Bit Socket Set, 1/16 Inch to 1/2 Inch, SAE, Extra Long Allen Hex Bit Socket Set, CR-V and S2 Steel, Bits made of premium S2 alloy steel for superior hardness and insure longevity,Cr-V steel sockets provide superior torque for greater turning power. Extra-long design allow bit to reach deep into especially narrow, recessed areas。 Insert smoothly with precision chamfered bit ends. Large, clear die-stamped size marking is easy to read and can’t wear off. Come with a heavy duty blow molded storage case, easy to carry. Meets or exceeds ANSI performance standards. It comes with 1 year quality warranty.