Description: For removing and installing valve cores in charged systems. Replace leaking valve cores quickly and easily. 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, R404A, R410A, R134A, R32 A/C air condition system, etc. The valve core remover installer tool is made of solid brass, which is durable and won't rust easily. Anti-slip design, increase hand friction, prevent all kinds of overpowered valves; High-quality craftsmanship probes, rugged and durable, suitable for most equipment. The core grabber tool makes it easy to insert it into the inner valve, so you can control the core, needn't to stop the machine or release the refrigerant, you can remove and install the valve cores conveniently, save hours of evacuation and charging time. Specification: Service ports: 1/4 Inch and 5/16 Inch SAE Female Bypass ports: 1/4 Inch SAE Male Material: Copper, aluminum alloy Valve core removal wrench basic operation 1.Pull out the dead point on the stem, close the valve on the tool, adjust the joint of the tool to the air conditioning interface, and tighten the valve on the air conditioning. 2.Make sure that the tool is connected tightly to the air conditioning valve, then open the valve on the tool. Push the stem into the air conditioning valve and gently rotate the tail knob of the remover. Find the angle to connect the valve core, and then loosen it. 3.When the valve core is removed, pull out the stem, close the valve on the valve remover, loosen the screw at the end of the tool and take out the valve core. Package Includes: 1 Set of Valve Core Remover Tool(2 Pack) Note: We suggest that before removing the valve core, close the valve core wrench valve and disconnect the air conditioner internal connection.