【BALL END DESIGN】: Each bit head has a unique ball end design, which allows the 3/8 drive hex socket to be inserted into the fastener from multiple angles. It can flexibly avoid obstacles to reach the fasteners, which is more convenient and practical. 【DURABLE S2 STEEL】: 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 allen wrench socket is made of chrome vanadium steel with stronger hardness after heat treated and provides higher torque.The surface is mirror chrome plated,which is more anti-corrosive and anti-rust than black oxide coating, extending the service life. 【LONG HEX BIT SOCKET】: Extra long allen socket set reach fasteners in the deepest recesses and tightest spot. More convenient to use in narrow spaces. It saves you money on the extension bar. 【20-PIECE METRIC & SAE】: With 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: 3,4,4.5,5,5.5,6,7,8,9,10mm, SAE: 1/8,5/32,3/16,7/32,1/4,9/32,5/16,3/8in, Universal Joint x 1, 1/2"to3/8" Adapter x 1. RIMKOLO 3/8 Inch Drive 20-Piece Extra Long Ball End Hex Bit Socket Set
1. S2 Steel Bit: S2 industrial grade material, high hardness, not easy to break.
2. CR-V Socket & Rounded Corner Design: Adopt durable and high quality CR-V material provides high torque. Rounded corner design protects your tools from wear.
3. Laser etching specifications will never disappear for easy identification of the socket.
4. Mirror chrome plated: chrome plated mirror finish, anti-corrosion and anti-rust, more durable.
5. Professional tools that meet the ASME and ANSI standards.

Set Includes:
Metric: 3, 4,4.5,5,5.5,6,7,8,9,10mm.
SAE: 1/8”, 5/32”, 3/16”, 7/32”, 1/4”, 9/32”, 5/16”, 3/8”
1 x 3/8" Drive Universal Joint
1 x 1/2"to3/8" adapter