3/8 in., 1/2 in. and 3/4 in. Internal Pipe Wrench SetRemoves pipe nipples. For use with adjustable or open end wrench. Expanding knurled design. Includes 3 8 in., 1 2 in. and 3 4 in. sizes. Can also be used for re installing nipples. Used to remove broken or frozen pipes and nipples Kit includes 3 8 in., 1 2 in., and 3 4 in. internal pipe wrenches Knurled pattern ensures solid grip Steel construction Can be used with a standard wrench, adjustable wrench or pipe wrench Sizes are clearly marked Easy to