Description: This is a durable 4 pcs socket adapter and reducer set. Heavy duty chrome vanadium steel construction is designed for use with drivers and wrenches. A black oxide finish makes each piece corrosion resistant and very durable. Spring loaded ball detent keeps your sockets still and secure. There are a range of sizes to accommodate many socket or wrench combination including 1/2"(M)--3/8"(F), 3/8"(M)--1/4"(F), 3/8"(M)--1/2"(F) and 1/4"(M)--3/8"(F). Features: Socket adapters are made from heavy duty chrome vanadium steel for durability and long service life. The surface of each adapter is finished by electroplating and blackening, which ensures corrosion resistance. Adapter body is designed with a ball detent and a small hole to keep your sockets still and secure. There are total four socket adapters of different sizes in this set and you can use for various sockets. These adapters are of small size and easy to storage; if you get a toolbox, this set should be in it. Specifications: Material: chrome vanadium steel Surface Finishing: Electroplating, blackening Hardness: 452(HRC) Color: black Size: 1/2"(Male)--3/8"(Female) 3/8"(Male)--1/4"(Female) 3/8"(Male)--1/2"(Female) 1/4"(Male)--3/8"(Female) Package Includes: 4 x Socket Adapters Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.