Basically you screw onto the tyre valve. It will hiss until it stops at your preset psi pressure level (say 20 psi is a general beach driving pressure). Take the unit off your tyre and enjoy safe beach driving.
This Analog Gauge with Deflator Button is a quality product built to last for years with long lasting brass fittings.
The unique design of the Rapid Tyre Deflator allows for removal of the valve core, via the simple movement of a sliding valve.Plus 4 way valve core remover Tool plus 4 x new Valve caps
Tyre deflator is a must have accessory for every 4WD that leaves the road. The large, battery operated digital gauge makes it easy to monitor the decreasing tyre pressure.
Features quick release attachment heads to easily convert from Rapid Deflator to normal Tyre Gauge. 2 inch dial with protective rubber cover, 0 to 60psi,Ansi B Grade Accuracy, Braided flexible air Hose, Protective storage Pouch
These are a must for 4WDs used on beaches or in sandy outback conditions. They allow you to automatically deflate all four tyres at once, saving 10-12 minutes each time.