The Topeak Valve Core Tool is a metal valve tool designed to tighten or remove Schrader and two-piece Presta valve cores. Can also be used to tighten or loosen Presta valve extensions.Topeak Valve Core Tool FeaturesMaterial: AluminumCompatible: Schrader or two-piece Presta valve coresSize: 4.5 x 1.1 cm / 1.8“ x 0.4”Weight: 7 g / 0.25 ozAdded Feature: Storage box More info