AutoEC 4-in-1 Tire Valve Stem Core Remover - Tire Repair Tool - Pack of 1 Essential tire repair and maintenance tool - so useful and handy, they're sold in pairs Performs four functions - valve core key, exterior valve threader, interior threader, core extractor Core key designed to remove core quickly and without damage; extractor used for damaged/broken core Interior & exterior threaders repair damaged valve cap and core threads for airtight seal Fits Schrader valves used on most air-filled tires; galvanized steel, high-quality