Title: 15PCS 3/8 Drive Metric Extra Long Allen Hex Bit Socket Set | 12 Pieces | Sizes 2.5mm 10mm | Shaft Length 6 | Premium S2 Steel Bits | Heavy Duty Cr-V Sockets | Exceeds ANSI Standards Universal Joint , 1/2" & 1/4" adapter Features: [QUALITY]: Premium S2 Steels Bits that reduce wear-outs and resists rust for maximum longevity. [TORQUE]: Heavy Duty Cr-V Sockets for greater torque and turning power. [CONVENIENT]: 6 in. Extra Long Bits for narrow, recessed, deep, or other hard to reach areas. [SECURE]: Meets or exceeds all ANSI standards to assure the highest level of performance and safety. DURABLE S2 Material: The bit socket head is made of S2 alloy steel, which is strong and has good toughness, not easy to break.It is not easy to wear and has good corrosion resistance. More durable,meet and exceed ANSI standards. HEAT TREATMENT CR-V: The socket base is made of chrome vanadium steel with stronger hardness after heat treated and provides higher torque.The surface is mirror chrome plated,and the Allen hex Sockets with manganese phosphate coating are more anti-corrosive and anti-rust than Black oxide coating, extending the service life. EXTRA LONG BIT SOCKET: Extra long bit and sockets reach fasteners in the deepest recesses and tightest spot. More convenient to use in narrow Spaces. It saves you money on the extension bar. EASY to IDENTIFY & 15-PIECEWith a storage toolbox, easy to carry. Specifications are clearly printed on the tool box and socket, which is convenient for identification and sorting, saving your time.3/8" Drive: Metric: 2.5,3,3.5, 4,4.5,5,5.5,6,7,8,9,10mm, Universal Joint x 1, 1/2"to3/8" adapter x 1.1/4"to3/8" adapter x 1. Specification Material:S2+PP Shaft Length 6 /150mm Drive head3/8" Long Allen Hex Bit :2.533.544.555.5678910mm Universal Joint 3/8 adapter 1/2"to3/8" adapter 1/4"to3/8" Packaging Size:25.3*14.8*5.8CM Product weight: 1350g Gross weight1420g Package List: 12* Long Allen Hex Bit 2.533.544.555.5678910mm 1* 3/8 Universal Joint 1* 1/2"to3/8" adapter 1* 1/4"to3/8" adapter 1* BMC