Core tools are one of the most important components of a proper evacuation rig. Removing the cores allows for a full unrestricted flow through the service port significantly decreasing both evacuation and or recovery times. Standard core tools are only designed to operate under pressure to allow for the replacement of leaking valve cores without the removal of the refrigerant. Appion core tools are rated for both vacuum and pressure allowing for typical service as well as faster evacuations and recovery. A side port allows for isolation of the hoses for determining the level of vacuum during the evacuation process. Engineered for vacuum, Appion core tools are the best money can buy.