High-Quality Material: This socket set is made of high-quality Cr-V steel with polished chrome surface and heat treatment, which insures good performance and long durability 39 PCS Socket Set: 16 PCS 1/4''metric sockets, 12 PCS 1/4''imperial sockets, 3 PCS 3/8''Metric sockets, 3 PCS 3/8''imperial sockets, 1 PC 3/8'' ratchet wrench, 1 PC extension bar, 1 PC adapter, 1 PC 1/4''drive spinner handle, 1 PC spin disc 1/4 ''and 3/8 '' & Metric and Imperial: The sockets have two specifications (1/4 '' and 3/8 '') , and have metric and imperial specifications. With quick-release ratchet wrench, you can quickly fix the sockets by pressing the button Compact Storage: Size of the plastic box: 24 x 13 x 5 cm. The compact and solid design makes it easy to carry and store tools in order Multi-Purpose Sockets: This socket set can meet various needs such as car repair and home maintenance. It is a must-have tool set for DIY enthusiast