This socket adapter is perfect for air tools, hand tools, . Impact sockets efficiently transfer torque from impact wrench to fastener, loosening the most stubborn nuts and bolts. Made of high strength steel with silver industrial finish. Whole quenching heat treatment, durable high hardness. Features - Color: Assorted color. - Material: Steel. - Size: 7.30X1.10X1.10cm/2.87X0.43X0.43 inch. - Contains socket wrench nut set 3-piece 1/4, 3/8, 1/2 inch and socket adapter 4-piece 1/4 to 3/8, 3/8 to 1/4 inch, 3/8 to 1/2, 1/2 to 3/8. - These tools adapt to the situation on the fly to get it done. They create replacements for lost or broken sockets, expand incomplete socket sets, and allows greater flexibility for all sockets and drive tools. - Detent balls keeps your sockets secure with through holes that allows the use of locking pin and rings. - Made of the steel, each piece undergoes a precise heat treating process, hardening and strengthening it for use with impact wrenches and drivers. - The exterior coating provides an extra protection from damage against elements and substances such as oil and attaching on the adapter in repairing. Package list: 7 x Socket Adapters