Tire Pressure Mettalic Guage better quality 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. accessories Best and accurate reading. direction of use :- Always check pressure when tire is cold. Push end of guage 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 guage to eliminate inner pressure after use.