Description: Material: Socket Wrench is made of steel material, with good durability and strength.Process: 3/4" to 1/2" adapter , 1/2" to 3/4" adapter, 1/2" to 3/8" adapter, 3/8" to 1/2" adapter, 3/8" to 1/4" adapter, 1/4" to 3/8" adapter , to give you all the sizes you need for transition from socket to socket smoothly.Socket Adapter: Ratchet Socket keeps your sockets locked into place and secure through holes that also allow the use of locking pin to ensure stability and execution.Quality: Professional manufacturing, finely machined, stable performance, long service life.Application: Socket Adapter is great for drivers, wrenches, and ratchets to convert size up or down for your automotive needs in the garage. The square drive converter is great for making the right connection. Specification: Material: Steel Size Chart: Package Box:15cmx8.5cmx5.5cm/5.91inchx3.35inchx2.17inch Package Includes: 6Universal Joint Socket Swivel Set Note: Please allow slightly errors due to manual measurement and different monitors.