To use the CP - 1.2 bike cassette pliers, simply place them on the cogs of your 5 - to 12 - speed bike cassette. They'll quickly grip the cogs without any need for manual adjustments. You can then use one hand to hold the cassette firmly while removing the lock ring. When using, make sure to keep a good grip on the dual - density handles for comfort and control. As for maintenance, keep the pliers clean after each use. Wipe off any dirt or grease. Store them in a dry place to prevent rusting. If you notice any issues with the spring - loaded return, it's best to have it checked by a professional.