Quickly evacuates air from tires without removing the valve core. Simply replace a standard sized valve cap with this handy tool and this special design will depress the pin in the valve core. Large openings on the side of the tool allow air to escape quickly from the tire. Tools are marled so tires can be returned to their original position on the vehicle so TPMS will not need to be reset. Also saves time since the valve core has not been removed from the sensor.