Tire Pressure Metalic Gauge Meter 100psi for Car, Bike, cycle etc. Description Metal construction. Caliberated in lbs, kpa, kg or bar. Shock resistant and release button which holds the value until the button is pressed. Increases gas mileage. Reduced tire wear by giving accurate value. Best and accurate reading. How To Use Always check pressure when tire is cold. Push end of gauge stem firmly into the tire valve until pointer reaches highest position. Read pressure from an angle vertical to dial face. Refer to the tire owner's manual to assess ideal tire pressure. In order to prevent fatigue, push release button on gauge to eliminate inner pressure.