[Specification]: 1/2"(Male)--3/8"(Female); 3/8"(Male)--1/4"(Female); 3/8"(Male)--1/2"(Female); 1/4"(Male)--3/8"(Female) [Socket Adapter and Reducer Set]: Package includes 4pcs socket driver converter, socket reducer socket adapter [Spring Loaded Ball]: The spring loaded ball detent keeps your sockets still and securely latch onto sockets, preventing them from being dropped [Premium Material]: The socket adapter is made of premium chrome vanadium steel with galvanized coating; High hardness, anti-corrosion, durable longlasting 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