Description: Advwin Socket Set are made of Phosphating Chrome Molybdenum Steel. 21 pieces of different size of socket can fit your multiple needs. With the portable tool box, you can put the tool kit into your cars in case you may use it to fix your cars some day. Besides sockets, there is also a handle in the box. One box is enough! Features: Phosphating Cr-V: The sockets are constructed of Chrome vanadium steel Cr-V to withstand extreme levels of torque changes against fasteners in the automotive setting. Every one has been posphated for maximum durability and protection. 6-Point Hex Design: 6-point hex socket design prevents round-off deterioration under high torque and hammering stress with use of impact and electric wrenches, allowing for greater contact with the flat surface area of fasteners. Clear Size Labels: It has size labels on the case of socket for organized storage, make it easy to locate and identify them. Home Repair Station: The set is a perfect choice to help you remove and install your tires, repair your cars, or do other repairing by yourselves. You can do these at home, help you save the maintenance fees. Gas & Electric Dual-Use: Advwin workshop tools set can be used both by gas and by electric energy. Specification: Type: Workshop Tools Set Kit Weight: 13.5kg Material: Posphated Chrome Malybednm Item Dimensions: 55cm*32cm*12cm Style: 3/4" Drive Deep Socket Number Of Pieces: 21 Head Style: Hex Measurement System: Metric Included Components: Sockets Batteries Included: No Package included: 1*Tool Box 1*Handle 1* 3/4" Extension Bar(100 pneumatic) 1* 3/4" Extension Bar(200 manual) 1* 3/4" Sliding T bar + Small sliding head combination 16*3/4 Drive Socket (Metric) - 19mm, 21mm, 22mm, 23mm, 24mm, 26mm, 27mm, 28mm, 30mm, 32mm, 34mm, 38mm, 41mm, 46mm, 50mm