Designed to remove & refit both Schrader & Presta type valve cores, this tool is a must when adding tyre sealant, fitting a Presta valve extender or replacing a valve core. Despite its small diameter, the knurled finish provides the grip needed to loosen & tighten the valve without requiring additional tools. Due to its compact size it would make for a great addition to any cyclists tool kit when out on a ride, especially when running a tubeless set up.