WHAT YOU GET 1 x Blue Valve Core Removal Tool; 10 x Brass Valve Core for daily use and replacement. SMALL HANDLING TOOL This valve core removal tool is a small and handy tool designed for removing and installing Schrader and Presta valve cores and removing and installing Presta valve extenders. UNIVERSAL VALVE CORE It has good airtightness. Made of premium brass, corrosion resistant, smooth thread and long service life. EASY INSTALL Use a wrench or valve removal tool to screw on the Presta valve stem, one end for the Presta valve core and the small end for the Schrader valve core. FIT ALL TYPE The tool is suitable for Schrader / Presta / Presta Extender / inner tube tire valve tools, makes it a great replacement tool. The tool is lightweight and easy to carry, great accessory for cycling lovers, you can choose the one that suits your bike. Specifications: Material: Brass Color: Blue Size: As the picture shows Package Included: 1 x Valve Removal Tool 10 x Presta Valve Cores How to use? Use a medium-sized wrench for Presta valve expansion. Use the larger end for Presta spool. Use the smaller end for Schrader spool.