4 IN 1 BYCYCLE VALVE TOOL MULTIFUNCTIONAL ACCURATE BICYCLE GAS NOZZLE WRENCH CORE TOOL With lightweight hollow design and unique prismatic shape, the disassembly wrench is easy and convenient to use, which will not slip when disassembling. With accurate opening size and CNC turning process, the product can be an ideal valve core installation tool. The 4 in 1 multifunctional disassembly wrench can be used to disassembly and assembly the valve core of French mouth and American mouth, French mouth extension rod, rim conversion nut and French mouth nut. Made of high quality aluminum alloy material, the product is unfading, wear-resistant, sturdy and durable. The length of the product is 3.5cm, the width is 1.7cm, the height is 0.44cm. It's suitable for conventional American valve, removable French nozzle, tube tire, and nozzle extension rod.