Primefit IK1015S-5 1/4-Inch Steel Quick Coupler Set, 5-Pieces 5-piece air quick connect kit with zinc plated steel construction 1/4-inch female quick coupler with heavy knurl grip for one-hand operation (3) 1/4-inch male plugs for most common air tools and nailer's 1/4-inch body fittings with 1/4-inch NPT connections Comes with a 1-year limited warranty