Durable Material: The bicycle cassette lock tool is made of quality carbon steel, which adopts quenching process to make it sturdy and durable which can be applied for a long timeSuitable size: the mountain bike cassette removal tool is suitable for 23.4mm diameter 12 tooth type tool, lightweight and portable to carry and store, taking up less spaceConvenient to use: these bicycle freewheel disassembly tools are easy and convenient for people to use, they allow you to use them without removing the cones and lock nut, and they can be applied to tighten on freewheels screwedBasic and important part: As part of freewheel and crankset disassembly tools, the cassette lockring remover is basic and important for you, helping you repair the bike quickly and efficientlyScope: the bicycle freewheel repair lock tool is suitable for most brands' 12-tooth type freewheel cassette lock rings, and also suitable for other 5-10 speed freewheels