Using the CP - 1.2 is easy. First, hold the pliers with one hand thanks to its one - handed operation design. Then, quickly grip the cogs of the bicycle cassette. The pliers can handle cogs with 9 to 24 teeth. Once you've got a good hold, you can either remove or install the cassette. When dealing with a stubborn lockring, use the long jaws and handle to get the extra leverage you need. As for maintenance, keep it clean after each use. Wipe off any dirt or grease. The forged steel construction is durable, but it's still a good idea to store it in a dry place to prevent rust. The spring - loaded return and dual - density grips are designed for long - term use, so just use it normally and it should serve you well for a long time.