Great Function: The valve core remover installer tool’s core grabber tool makes it be easily inserted into the inner valve core to control the core. No need to stop the machine, no need to release the refrigera. | Premium Quality Valve Sets: The valve core remover installer tool is made of high quality thicker brass and rubber, the metal knob is all designed with anti-slip design, last long; Easy to operate and install, strong sealing for durability and safety. | Extensive Usage: Suitable for all refrigeration equipment, dual size( SAE 1/4'' & 5/16'' Port ) design makes the valve core remover installer tool be compatible with R22, R12, R407, R410, R404, R32 A/C air condition system, etc. | Main Features: Anti-slip design, increase hand friction, prevent all kinds of overpowered valves; High-quality craftsmanship probes, rugged and durable, suitable for most equipment. | Good Deisgn: Durable, solid brass tool has a ball valve that can be opened and closed in just a quarter-turn, rather than a slower to operate stem-type valve. (No Gas Loss)