Professional AC charging port valve core remover and installer set | 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. | Will work on both R134A and R1234YF automotive air conditioner systems | Come with every thing you need for a fast and effective valve core replacement job | Organized in an impact abs case for easy storage