Because this gauge has the unique "pressure release" feature you don't have to contort your body to read it. You simply insert the gauge into the valve, remove it, read it, and press the "reset button" to get another reading. It's versatile, very easy to use, durable and priced right.
The Kwik Check Gauge works on Leafield, Halkey-Roberts, Summit and most "knock-off" valves.
Most manufacturers recommend 3-5 pounds of pressure in your inflatable boat. Five-pounds pressure is pretty tight, but boats normally perform best when hard. Check for manufacturer's recommendations. Remember to release pressure before you are going over high mountain passes and to check pressure when your boat is exposed to hot sun.