Features and Benefits: 

• 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

Impact Adapter, 1" Drive Female to 3/4" Drive Male, with 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.