Product Description 8 piece chrome universal and adapter set includes: 1/4"F-3/8"M adapter, 3/8"F-1/4"M adapter, 1/2"F-3/8"M adapter, 1/2"F-3/4"M adapter, 3/8"F-1/2"M adapter, 1/4" drive universal joint, 3/8" drive universal joint, 1/2" drive universal joint Amazon.com The SK Hand Tools 8-Piece Universal Adapter Set features a high polish SuperKrome finish, which provides for long life and maximum corrosion resistance. The SureGrip rail holds sockets tightly with a spring-loaded steel ball similar to a ratchet drive square, while the ball detent securely holds sockets on coupler to prevent slippage. This universal collection provides improved access to hard-to-reach fasteners while adapters provide convenience, and add flexibility to your tool set. Additionally, the SuperKrome plating results in a jewelry-like finish that allows for easy clean-up as well as maximum corrosion resistance. From the Manufacturer 8 piece set made in the U.S.A. features high polish SuperKrome® finish, which provides for long life and maximum corrosion resistance. Ball detent securely holds sockets on coupler, to prevent slippage. The exclusiveSureGrip® rail holds sockets tightly with a spring-loaded steel ball similar to a ratchet drive square. Sockets can be removed quickely and easily from the rail. See more