GoldenGrip 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. Internal pipe wrench is self locking and high strength in chrome pipe, brass pipe applications. GoldenGrip internal pipe wrench; The right tool for quick and easy installation or extraction of pipe nipples, Self-locking, reversible internal wrench can be used with ratchets, extensions and impact wrenches. FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets.