Features: Made of high quality material, durable and practical to use 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, valve removal tool, refrigeration air condition services for pressurized mini split system. Material: Copper Service ports: 1/4" and 5/16"SAE Female Bypass ports: 1/4" SAE Male 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. The work is done! Package includes: 1Pc x Valve Core Remover Installer, 1Pc x Valve Core Remover, 10Pcs x 5V1 valve core Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.