Rectorseal 97250 Single 1/2-Inch GoldenGrip Internal Pipe Wrench

Golden grip is the world's only self-locking, reversible, internal wrench. Use it with ratchets, extensions and impact wrenches, to get in fast and get the job done right the first time. This revolutionary design can't damage threads and can remove the most stubborn nipples. Patent # 6,675,679B2.