This old garage tool is a vintage tire pressure gauge used to check the air pressure inside automobile tires.
The angled fitting at the end was pressed onto the tire’s valve stem. Air pressure then moved the mechanism inside the gauge, and the dial displayed the reading in PSI.
Drivers and mechanics used tools like this to make sure tires were properly inflated before modern digital gauges became common.
Maintaining the correct tire pressure helped improve handling, tire life, and everyday driving safety.
The correct answer is a vintage dial tire pressure gauge.
