Not all couplers are created equal, and nothing proves that more than the Master Mechanic Female Safety Coupler from Frita Inc. This uniquely designed safety coupler comes equipped with a two-stage release mechanism that helps users avoid injury or damage that might result from accidental disconnects. It boasts an innovative push-button design to ensure a quick and stress-free connection and disconnection of tools, and with the added bonus of preventing air pressure and air blow back. And we promise the safety coupler couldn’t be easier to use, only requiring one push to stop air flow and two pushes to release the plug. The Master Mechanic Female Safety Coupler from Frita Inc. measures ¼-inch I/M coupler to ¼-inch NPT female and puts user safety front and center.