Refrigeration and HVAC dualhead ratchet spanner designed for reliable service in tight spaces. Function and design: Dualheaded ratchet spanner optimized for refrigeration, air conditioning, and related equipment, delivering fast, secure turning with enhanced accessibility. Compatibility and sizes: Works with 3/16 in, 1/4 in, 5/16 in, and 3/8 in fasteners or valves, reducing the need for multiple wrenches. Material and build: Made with durable metal construction and clearly marked handles for quick size identification and reduced guesswork. Durability and performance: Professionalgrade manufacturing to withstand frequent use and provide long service life in demanding environments. Use scenarios: Servicing residential air conditioning units and household refrigerators where space is limited. Replacing valves and fittings on commercial refrigeration equipment or walkin coolers. General maintenance and assembly tasks on HVAC/R systems that require 3/16–3/8 inch fasteners.