Test compression of gasoline engines on domestic and foreign cars and trucks plus motorcycles, snow mobiles and lawn mowers Adapters provided for 10mm, 12mm, 14mm and 18mm applications Flex hose eliminates need to remove auxiliary equipment Screw-in adapters provide better accuracy over push-in type testers Quick disconnect for easy hook-ups Quick side release valve permits retests without removal of adapters Gauge ranges: 0-300 psi and 0-21 BAR Comes complete with repair kit that includes "O" rings, valve cores and installation tool