duratech internal pipe wrench set, pipe nipple extractor set, 3-piece, includes 3/8",1/2",3/4"

Common Size: Each set comes with 3 internal pipe wrenches?and they are suitable for 3/8-inch,1/2-inch, 3/4-inch pipe capacities. | No Thread Damage: Internal pipe wrench set is ideal for removing broken threaded pipe ends, plugs and fittings without marring, scratching or denting pipe surface or threads. | Cam Design: The machined and heat-treated cam forms a strong internal grip on the broken pipe, making it easy to catch pipe fragments. | Easy To Operate: Put the internal wrench into the pipe, use a fixed or adjustable wrench to turn the hexagonal body to increase the torque, and it will tighten or loosen broken piece. It works in either direction and can be used to remove both left and right handed threaded nipples. | Wide Application: The pipe nipple extractor set removes and installs short nipples with exposed threads, heater hose fittings, plumbing, HVAC connections, and oil filter plugs that have metal or plastic piping (not for PVC).