1. Turn Valve Lever in the direction of flow so the shaft can go through the body. Specialty Equipment Specialty AC Charge Port Spool Remover and Installer Kit Compatibility Compatible with standard, JRA and schrader valves, but you will need to use a dab of vacuum grease on the end of the probe to insure that the schrader valve stays attached to it during core removal Suitable for Work on both R134A and R1234YF automotive air conditioner systems Equipped with tools All tools needed for quick and effective spool replacement are included Convenient storage Comes in an impact resistant ABS case for easy onward storage and use