Valve Core Remover/Installer Tool. Has two different size ends for both small and large bore valve cores including residential/refrigeration/commercial and automotive valve cores. Has a brass knurled knob for easy turning and is approx. 2 1/2" L. These valve core tools are generic and brand new. For use in air conditioning and refrigeration. Will also work on automotive/truck tires, R12/134A automotive AC systems and bicycle/motorcycle tires,ect. Please note: This valve core tool does not provide ft/lb torque measurements.