A/C THREAD CHASERS SET this kit is designed to repair and recondition threads on gas and liquid fittings in air condition, hydraulic and gas applications. Each chaser is clearly maked and also can be use to properly identify thread sizes Clearly maked thread identification Male and female threads Side holes for use with supplied handle Hex end for use with standard shop wrench Size: 5/8"x18UNF, 3/4"x16UNF, 7/8"x14UNF, 1"x14UNF, 1 1/16"x14UNF