Specification:Item: Valve Core Remover Installer, R410a valve core removal tool, R22 valve core removal tool, a/c valve core removal tool, HVAC valve, core removal tool, Schrader valve removal tool, refrigeration air condition services for pressurized mini split system.Material: CopperService ports: 1/4" and 5/16"SAE FemaleBypass ports: 1/4" SAE MaleValve 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. The work is done!Package Include:1Pc x Valve Core Remover Installer,1Pc x Valve Core Remover,10Pcs x 5V1 valve core.Note:Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.Warning:Before removing the valve core, close the valve core wrench valve and disconnect the aire conditioner internal connection.