Package Included: 5 Pieces 1/2 Inch Drive impact socket set: 15mm, 17mm, 19mm, 21mm, 22mm. Application: The 6-point design provides a firm non-slip grip for removing or installing lug nuts; the spacious inserts leave sufficient room to remove long bolts from your car. Storage case makes organization, transport, and storage a piece of cake. Material: Made from chrome molybdenum steel, withstanding vibration from the impact wrenches far better than regular sockets made from less ductile steel; the color coding doubles as a coating further improving their corrosion resistance. Laser Marking: Every wheel lug socket is laser-etched and color-coded with its specific size for easy identification. Scratch-Free Operation: 360°Non-scratch nylon sleeve and insert protect bolt tops, wheel rims, and lug nuts from scratches during use. Impact Socket Set: Material: chrome molybdenum steel. Size: 15mm, 17mm, 19mm, 21mm, 22mm. Attention: 1.Please place it where the child can't reach it; 2.Do not use it as a hammer to knock on hard objects; 3.If you receive a defective product or have any problems during use, please feel free to contact us.