Brass tool set with valve designs that allow quick quarter-turn operation for fast engagement and disconnection. Includes both high-side and low-side couplers to ensure compatibility with different air conditioning systems. Designed for professional automotive technicians and HVAC engineers, making removal kits for valve cores easier and simplifying maintenance tasks for both vehicles and household air conditioning units. R134A valve core removal and quick-install tool set designed for fast and efficient removal and installation of high-pressure valve cores in R134A refrigerant air conditioning systems. Enhances your AC maintenance capability with these comprehensive kits, which include additional R134A and 5 V1 valve cores to ensure you are always prepared for valve replacement work. Use scenarios - Automotive air conditioning service: efficiently remove and install high-pressure valve cores in R134A automotive AC systems during routine maintenance, troubleshooting, or refrigerant service. - Household and light commercial HVAC maintenance: service household AC units and small commercial systems that use R134A, enabling fast core replacement and system upkeep. - Workshop efficiency for multiple units: in a busy shop, the brass kit with both high-side and low-side couplers streamlines valve core work across different vehicles and HVAC configurations, reducing downtime.