Quality Material: This ratchet wrench set is made of Cr-V, and the polished chrome-plated surface with better durability and reliability, the performance increases further More Efficient Design: As long as you turn 5 degrees, the ratchet wrench teeth are all turned once, and the quick release design allows you to quickly install or change the socket, which provides maximum tightening and also saves your strength Practical Socket and Extension Bar: Particular curved head of sockets enlarges the contact surface, thus it reduces the risk of unintentional slipping and possible bolt damage. In addition, you can use the extension bar to work in the narrow place or space What You Get:Includes 12 pieces 1/4" Cr-V sockets: 4 - 4.5 - 5 - 5.5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13mm and 1 piece 1/4" quick release ratchet wrench with 72 teeth and 1 piece extension bar Wide Use:By using this ratchet wrench set, it is able to satisfy various usage demands such as vehicle and mechanism repair