Pressure-Reducing Valve Wrench: Designed for disassembly and installation of pressure-reducing valves, dual-flow valves, and high-pressure valves. It can also open beer bottles and walnuts for convenience. Tank Wrench: Built with high hardness for durability and a comfortable grip that is easy to hold during use. Cylinder Tank Wrench: Features inner and outer guiding plates for precise fit to the valves and reliable, slip-free operation. Multifunctional Wrench: Ergonomic handle, easy to grip, compact and portable for flexible use at home or outdoors. Use scenarios: - Home plumbing maintenance: install or remove pressure-reducing valves and related valve types in residential systems. - Industrial equipment service: tighten or loosen valves with precision in tight spaces, minimizing slip and damage. - DIY and outdoor tasks: compact, portable tool for valve work on projects or on the go, plus handy bottle and nut opening when needed.