Product details:

Features and Benefits: Works with Grey Pneumatic 1/2 sockets Features a spring loaded locking pin Made from high quality chrome-molybdenum steel Heat treated for strength and durability Size markings are hard stamped into the socket for easy identification Impact Extension, 1/2 Drive, 36 Long, 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.