Self Locking Function: This wrench has built in self locking mechanism that automatically locks after clamping, allowing for one handed operation, particularly practical for high altitude operations or narrow spaces. Versatile Use: This wrench automatically matches various nuts, suitable for water pipes, screws, and common nuts and fittings such as round and square, suitable for large pipelines, automotive parts, mechanical equipment, and industrial hardware. Multi Functional: Unlike most self locking wrenches, our adjustable pipe wrench has a hole design at the bottom that can serve as a nut tightening tool. Built in spring, can automatically 50 Steel Material: The wrench is made of 50 steel material, with high strength, toughness, wear resistance, and rust resistance, ensuring long lasting performance in use and harsh environments. Secure Grip: The serrated reinforced jaws, combined with self locking structure, can maintain a stable and anti slip grip even on oily or slippery pipe surfaces, ensuring reliable contact without damaging the ., Manufacturer: Aundhegrtt