Quick and Easy FIX for "slow" leak in any tire. It tightens core inside shrader valves.
An important tool to have if your cars warning light is on all the time for "LOW TIRE" and you fill the tire(s) all the time. Its usually due to the core inside the valve is loose, creating slow leak. After getting new tires, all mine were loose / leaking - this tool fixed it quick and easy and extended life of the tires.