Superior Tools Internal Pipe Wrenches are the tools to reach for when you need to remove broken threaded pipe ends without damaging pipe threads or surfaces. The unique Cam Action design provides a non-slip grip on the inside of nipples, pipes, and fittings. The wrench can be turned either clockwise or counterclockwise. Our internal pipe wrenches are made of zinc-coated, heat-treated alloy steel for a long life and are available in three sizes.