Proto Internal Pipe Wrench Set: 3/8 in/1/2 in/3/4 in/1 in For Pipe Size, 3 in Tool Lg, 4 # of Sizes

Internal pipe wrenches (also known as internal pipe extractors) are inserted into a pipe and then turned with a common wrench so the pipe can be rotated for removal. They have a series of small ridges on the outside to securely grip the inside of the pipe before the wrench is turned to rotate the pipe. They are used when a pipe can’t be gripped from the outside and for removing broken threaded pipe ends, pipe plugs, and fittings.