ITEM NAME:Double-end Car HVAC Valve Core Remover Changer Installation Removal Tool Product Description Description: Features: 100% brand new and high quality; Made of metal, can be used for a long time; Suitable for car air.Included: 1 X Double-end HVAC Valve Core Removal Tool. Function: the small end is used to twist the Schradar valve core, and the big end to screw the big valve core. If item is defective after 3 months, you can still send it back to us.