The profional spool disassembler kit is suitable for R134A and R1234YF automotive air conditioning systems and is compatible with standard, and Schrader valves. And the quality automotive air-conditioning valve core is compatible with R12, R134a, R1234YF automotive and household air conditioning accories. The Car Air Conditioning Valve Core Removal Tool Set is a must-have for automotive technicians and DIY enthusiasts. The high and low-pressure tools precise and efficient disassembly of valve cores. Made from high-quality materials, this tool set is and reliable for long-term use. Keep your car's AC system in top condition with this professional tool set. How to remove or install the spool: 1. Rotate the valve stem in the direction of so that the shaft can pass through the valve body. 2. Connect the valve core to the servi port of the system. 3. Push the shaft toward the servi port, and slowly and carefully rotate the shaft until the tip of the shaft engages with the valve core body. 4. Rotate the shaft counterclockwise by turning the shaft knob until can no longer turn the shaft. 5. Pull out the shaft completely, close the valve, and the valve stem is perpendicular to the direction. 6. Loosen and remove the shaft connecting nut from the valve body, remove the old valve core, and install another valve core. Color: As Shown Material: Metal Package Contents: 1*AC Valve Core Removal Tool set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.