[PROFESSIONAL ASSISTANT] Designed for removing and installing valve cores in charged systems. Replace leaking valve cores quickly and easily. Dual size fits charge systems using R410a, R22, or other retrofit refrigerants. [WELL-MADE] The valve core remover installer tool is constructed from solid brass, ensuring durability and resistance to rust. Features anti-slip knurled metal knobs for a secure grip and long-term use. [TIME-SAVING] The core grabber design allows easy insertion into the valve stem, enabling control of the core without shutting down the system or releasing refrigerant. Simplifies removal and installation, saving significant evacuation and charging time. Valve core removal wrench basic operation: 1. Pull out the dead point on the stem. Close the valve on the tool, attach the tool joint to the air conditioning service port, and tighten securely onto the valve. 2. Ensure the tool is tightly connected. Open the tool valve, push the stem into the air conditioning valve, and gently rotate the tail knob to engage the valve core. Once aligned, unscrew the core. 3. After removal, pull out the stem, close the valve on the remover, loosen the end screw, and remove the valve core. Note: It is recommended to close the valve on the remover tool and disconnect the internal air conditioner connection before removing the valve core. 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 service tool for pressurized mini split systems. Service ports: 1/4 Inch and 5/16 Inch SAE Female Bypass ports: 1/4 Inch SAE Male Color: Yellow Material: Copper Package Contents: 1 x Valve Core Remover Installer 1 x Valve Core Remover 10 x 5V1 Valve Cores Note: Light and display differences may cause slight variations in color between the image and actual item. Measurement may vary by +/- 1-3 cm.