Sturdy Cr-V Steel: This DURATECH socket set is made of heat-treated chrome vanadium steel (Cr-V), offering high hardness and durability, which greatly improves the service life of the product. The surface is plated with bright chrome for rust resistance Great Value for Price: This 121-piece mechanics tool set includes 47 pc Metric/SAE sockets with corresponding 1/4" and 3/8" drive ratchets, 1 pc magnetic screwdriver with 40 pc bits, 10 pc nut driver bits, 18 pc hex keys, 2 pc extension bars, 1 pc adapter, 1 pc 1/4" coupler and 1 pc storage box. It can meet your different needs and is ideal for car and motorcycle repair Efficient Ratchet: The 1/4" and 3/8" drive ratchets are designed with an easy-to-use reverse switch on the head, allowing you to quickly change the turning direction to tighten or loosen bolts more effectively. The quick-release button also helps you replace sockets quickly without tools 40-in-1 Magnetic Screwdriver & Ratchet Screwdriver: Comes with a versatile magnetic screwdriver with 40 pc interchangeable bits, meeting professional needs. It is also designed with a non-slip handle, providing a more comfortable grip. The 1/4" drive ratchet can be easily converted into a ratcheting screwdriver with the coupler Easy To Use & Storage: Each socket features high-visibility size markings and a different recess design (Metric – single recess; SAE – double recesses) for easy identification and use. All tools are stored in a sturdy and robust case to ensure protection during transport and storage, Weight: 9.92080179 Pounds, Manufacturer: Hangzhou Great Star Industrial Co.,LTD