The STEELMAN 75076-IND 3-In-1 Universal Quick Disconnect Coupler is the answer to the workshop or garage that uses an assortment of various quarter-inch plug fitting types on its air tools. Interchangeable between MP, AP, and TP series plugs it can be fitted to any standard quarter-inch air hose that has an NPT male threading.The sturdy brass construction is zinc-plated for enhanced durability and is designed to operate under pressures of up to 300 PSI.