Durable material and design - Brass construction provides durability and rust resistance for long service life. - The metal button is non-slip, ensuring a secure and comfortable grip during use. Main structure and features - The base part includes a valve component with a ball valve, a metal cap, and a built-in magnet to grip the valve core tool, making operation convenient and efficient. Easy to install and use - The core gripper tool is designed to ease inserting into the inner valve. - You can control the machine and remove or install valve cores without stopping the machine or releasing refrigerant, improving efficiency during service. Compatibility and design details - Sizes 1/4 and 5/16 double size can be adapted to R22/R134A/R410/R32/R12/R12 air conditioners. - External bypass port design enables removal of valve cores as part of maintenance. Key benefits - Reduces downtime by enabling valve core removal and installation without halting equipment or venting refrigerant. - Durable brass construction and a non-slip metal button provide reliable, long-term use. - Built-in magnet and practical design simplify handling and operation of valve cores in the field or shop. Recommended use scenarios - In-field service on active air conditioning systems to replace valve cores without stopping the system, especially when working with R22, R134A, R410, R32, and R12 refrigerants. - Routine maintenance and quick valve core swaps in HVAC service calls or repair shops, minimizing downtime. - On-site troubleshooting and valve core servicing for residential or commercial AC units where rapid core removal and reinstallation are beneficial.