1Multifunctional Application: The included wrench is suitable for adapters of different sizes including 5/16in x 1/4in, 5/16in x 3/16in. These sizes are commonly used for repairing air conditioning and refrigeration equipment. 2Versatile Use: The valve core remover has a wide range of applications and is suitable for home refrigeration equipment, practical and convenient to use. 3Applicable System: The valve core removal tool has dual size of sae 1/4 inch and 5/16 inch ports, applicable for R410, R22, R12, R407, R404, R32 A/C air conditioning systems, and more. 4Durable Construction: The Ac valve core remover installer has a golden bottom, which makes them highly resistant to heat, durable and reliable, ensuring a longer lifespan. 5Easy to Use: With the valve core remover installer tool, you can easily insert the valve core rod into the internal valve core and control it, no need to stop the machine.