1. This multifunctional wrench is suitable for pressure valves with a flow channel diameter 50mm, making it perfect for gas valves and tanks. 2. Gas wrench with its clamp, this wrench is easy to use and more efficient for opening pressure reducing valves. 3. The main body of the wrench is made of high density alloy, and the handle is made of material, providing excellent durability and wear resistance. 4. The Gear design wrench ensures a close fit with the making use simple and labor saving. 5. Gas tank wrench is not only ideal for gas repair, it can also be used as general purpose hand tool such as bottle opener, clip walnuts, and have various functions.