Using the Makita 625-80600-02 string trimmer guard is easy. First, make sure your Makita String Trimmer model RBC2510 is turned off and unplugged. Then, simply install the guard onto the trimmer following the quick and easy installation process. When you start using the trimmer, the guard will protect you from flying debris and give you a better view of what you're cutting. The line cutter on the guard can be used to trim the line to a usable length whenever you need. As for maintenance, after each use, clean the guard with a soft brush to remove any dirt or debris. Check the guard regularly for any signs of damage. If you notice any cracks or breaks, replace the guard immediately to ensure your safety.