COMPATIBILITY: It can be applied to disassemble the conventional Schrader and removable Presta valve cores. This double head inner tube wrench makes it possible for you to choose the suitable one to match your needs.ADD-ON FEATURE: 5mm flats designed for replacing Presta Valve Extender. This cut is where the removal tool resides to provide enough leverage to loosen the core.LIGHTWEIGHT AND PORTABLE: The valve core remover tool is a multifunction portable tool made of Aluminium, which weighs only 9g/0.02oz. It’s a must-have in your saddlebag, a handy tool accessory for cycling enthusiasts!EASY TO TIGHTEN: Fits between spokes for quick and easy core removal, easily tighten or remove valve cores on any road bike and MTB tubeless valve stem.ORDER NOW, WORRY FREE! We're so confident about our product quality that we can provide a lifetime warranty! Made in Taiwan.