Set of Two 4-in-1 Tire Valve Core Remover and Tools Essential tire repair and maintenance tool - so useful and handy, they're sold in sets of two 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-style valves used on most cars, trucks and motorcycles. Non-rusting galvanized steel, excellent quality, made in Taiwan