The Ascot Supply 3-in-1 Extractor & Inflator Tool, No. 469-00443, efficiently removes and installs valve cores and can be used to inflate tires as well. It has a 1/4" threaded inlet with specialized air-holding seals that speed the airflow through the tire valve in less time. Users simply have to attach the chuck to the valve stem, press the knurled end inward to unscrew the valve core, and then pull the knob to securely hold the core in an airtight chamber. The tool is 5-1/8" long and can be extended to 6-3/4", keeping the core secure and eliminating lost valve cores.