TLVCS410 CPS Mini-Split 5/16" (1/2"-20 UNF ) Female x 5/16" Male Valve Core Removal Tool. Remove and install the valve core from 5/16" Fittings. 1/4" Male flare access fittings on the side and top. Remove cores without the loss of refrigerant or in situations where Fast evacuation or charge is desired. Schrader core fittings only allow 1.2 CFM flow, removing the core dramatically improves the speed of recovery, vacuum and charging. Durable, solid brass tool has a ball valve that can be opened and closed in just a quarter-turn, rather than a stem-type valve. Designed for durability and long life. (This tools has 5/16" Male flare access fittings on the top).