BInterdynamics (QC-2HD) R134a Refrigerant AC Charging Gun ReviewbP PP Interdynamics (QC-2HD) R134a Refrigerant AC Charging Gun POne-hand control, squeeze trigger to fill and release to measurePHeavy-duty die-cast metal constructionPLarge easy to read measuring dialP90 degree push and lock coupler locks on cars low side portPAccurately measures and charges R134a systemsP