Material: universal sleeve connecting rod is made of tool steel, which ensures long service life in difficult torque operation and will not damage or rust heavy structure The impact-grade socket adapter kit includes a set of 3 adapters: 1/4 "3/8" 1/2 ", which converts any electric tool kit bit kit into a nut sleeve kit. The coding ring of different colors makes it easier for you to select the appropriate ring. The impact drive socket adapter is compatible with all brands of electric drills. The spring-loaded stop ball design ensures that the adapter can work safely with 1/4 inch, 3/8 inch or 1/2 inch drive sockets. These extension rods are connected to any electric or cordless drill chuck or impact drive to turn it into a high-speed nut drive. Purpose: It is suitable for the maintenance of automobile machinery and vehicles, the development of technicians, miscellaneous workers and amateurs, and can be used for the sleeve of hardware tire nuts, square head bolts and hexagon head screws in families, workshops, factories or construction sites., Manufacturer: HYUNRWB Co., Ltd