Castle Nut Wrench Material and durability: strength carbon steel construction for durability and a long service life. Higher hardness and stronger corrosion resistance improve longevity in demanding use. Antislip handle: Red rubber handle provides a comfortable touch and an ergonomic design to ensure the force transmission and control. Open nut wrench design: Specifically designed for easy disassembly and installation of open nuts. Usage: The buffer tube wrench is used to fasten or remove round nuts and water meter covers on machine tools and machinery. Benefits at a glance: durable construction, long service life, comfortable grip, precise handling, suitable for machine tools and related equipment. Use scenarios: 1) Servicing water meters by removing or securing the meter covers. 2) Maintenance and of machine tools where round nuts need to be fastened or removed. 3) General open nut assembly or disassembly in equipment that requires an open nut wrench.