Bicycle Crankset Tool Powerful 2023 New Mountain Bike Bicycle Axle Puller Bicycle Repair Tool Kit Multifunctional Chain Cutter How to use Rama: Step 1, remove the cover on the chainring, after removing , you can see the bottom bracket screw! Step 2: Use the 14 sleeve function of the crankset tool + 16MM open-end wrench to remove the bottom bracket screw Step 3: Remove the bottom bracket screw and put it aside! Step 4: Screw the black headgear into the chainring, remember to screw it to the end, otherwise it is possible to pull the threads on the chainring when setting the chainring! Step 5: Screw the black headgear to the end. Step 6: Screw the silver top rod into the headgear, screw it in by hand, and screw it to the end. Step 7: Use a 16MM open-end wrench to screw in the ejector rod again. It will be a little harder to screw in here. It doesn't matter, screw it in. screw it in a little bit, and it's easy to ! Step 8: Screw the ejector pin to the end, and the chainring is ejected like this! Specifications: Product name: Crankset tool/square hole pull code/remover/crank remover NameBicycle Crankset Tool [Material] 45# carbon steel, quenching treatment, stronger hardness, chrome-plated surface [Function] The bicycle chainring is disassembled, the ejector rod is lengthened, and the square mouth and spline chainring and crank can be disassembled, which is more practical and convenient. Weight120 grams [Name] Bicycle Bottom Sleeve [Material] 45# carbon steel, nickel plated on the surface [Size] Length 4.8cm, maximum diameter 3.2cm Weight100G Product Name: Chain Cutter [Product weight]: 128G [Product details]: 45# steel quenching heat treatment (super hardness) Package Included: Bicycle repair tools*1