This drive adapter features a locking pin, which is a spring loaded pin
Works with Grey Pneumatic 3/4" sockets
Made from high quality chrome-molybdenum steel
Heat treated for strength and durability
Black oxide coated for resistance against rust and corrosion
3/4 in.; Female x 1/2 in.; Male Adapter w/ Locking Pin. 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.