ProTool Swivel Quick Connect Air Coupler - 1/4" NPT Male Protect expensive air hose and air tool fittings with swivel couplers Nipple swivels 25-degrees & freely rotates to reduce hose & tool strain, superior operator comfort Solid brass male 1/4" fitting, finely-machined stainless steel nipple & ball for no-leak connection Also available female-threaded Excellent quality; made in Taiwan