The FORNAX tire inflator gauge is a complete 3-in-1 function tool ready for testing tire pressure, deflating, and inflating the tyre with the air pump or compressor. It has two units (PSI/ BAR) to read. The range of the gauge is 0 to 175 PSI, it can read the pressure very quickly. Heavy-duty construction withstands everyday use and abuse. Trigger helps control airflow into the tyre. Dual foot air chuck for use in hard-to-reach areas. Built-in relief valve to reduce pressure in over-inflated tyres and zero gauges.