The Haltec Lock-On Air Chuck is an air chuck that locks onto air hoses and nozzles to provide a secure connection. It is made from zinc alloy and has a 1/4 inch NPT thread. The air chuck has a working pressure range of 0-300 PSI. Key features include the lock-on design that prevents accidental disconnection, 360 degree swivel capability, and corrosion resistance. This air chuck can be used with air impact wrenches, air ratchets, blow guns, and other pneumatic tools that require a 1/4 inch NPT connection. It provides a tight seal and secure hold.