The valve disassembly tool consists of a qualified aluminum alloy, strong and durable, not easy to break. This Valve Core Tool is a small, handy removal and installation tool for Schrader and Presta valve cores and removal and installation for Presta valve extensions. Multifunctional tire valve tool, light and easy to carry, great accessories for cycling enthusiasts. Size:54mm x 10mm Bike Valve Core Repair Tool is suitable for Schrader / for Presta / for Presta Extender / for tubular valve tools. Features 1. Removes and install the Presta Valve Core, Schrader Valve Core (not all are removable). 2. Removes and install Presta valve extenders with 5mm wrench flats. 3. Widely used in the disassembly and assembly of French valve cores, the disassembly and assembly of French valve extension rods, and the disassembly and assembly of American valve cores. How to use Core Repair Tool Set 1. Use the middle wrench for Presta valve extender. 2. Use The bigger end for Presta valve core. 3. Use the small end for the Schrader Valve Core. Specifications: Size: 54 mm high, upper and lower joints are 2.3 mm and 4.3 mm Color include: blue, red, black Weight: 8g/pc Material: aluminum alloy Package includes: 2pcs*Valve Core Tool Warm tips: Not all valve for Presta cores are removable.