a Tire deflator is a tool that is used to deflate a tire quickly and accurately. It works by screwing the tool onto the tire valve and then a second internal mechanism will need to be turned to remove the valve core. Removing the valve core causes air to quickly escape the tire. The tire deflator has a gauge that shows air pressure, and you can deflate the tire to a desired tire pressure quickly without hassle.
Tire deflators are popular with people regularly driving off-road or doing 4 by 4 routes. Driving on the road tires need to be the correct tire pressure recommended by the car/tire manufacturer. Going off-road and especially where you encounter thick sand you need to deflate your tires not to get stuck. a Tire deflator will do the job in mere seconds.