This drive adapter features a locking pin, which is a spring loaded pin
Works with Grey Pneumatic 1/2" sockets
Made from high quality chrome-molybdenum steel
Heat treated for strength and durability
Black oxide coated for resistance against rust and corrosion
Impact Adapter, 1/2 in.; Female to 3/8 in.; Male, with Locking Pin Retainer. To use, line up with the socket retainer hole and press pin. To release the socket, insert object through the retainer hole and press the locking pin.