he gauge is made with an adjustable valve-stem depressor. It"s preset to work on Leafield and Halkey-Roberts valves. For other valves screw the depressor in or out. * For Leafield and military valves, remove the included adapter. Add the adapter for use with Summit, Halkey-Roberts, Innova and similar valves. * Large, high contrast display reads from 0 - 20 psi (0-1.4 bar) and is easy to read in all conditions. * This gauge must be in the valve while you read the gauge. * Lightweight construction and heavy-duty rubberized shell make this gauge very easy to handle, and it"s protected when banging around in your dry box.