Ball Valve Core Removal Tool (BV-CRT) for use on 1/4" flare access fitting, 1/4" male flare side port for attaching hose or gauge. The BV-CRT works the same as our original CRT. It removes a valve core from a 1/4" male flare access fitting without the loss of refrigerant. It has a ball valve inside rather than a stem type valve, so the tool can be closed with just a quarter turn.