Using the D'Addario NS Universal Strap Lock System is easy. First, install the locks on your instrument as per the included instructions. It's a hassle - free process. To attach the strap, simply connect it to the locks. When you're done playing, you can quickly remove the strap. As for maintenance, keep the locks clean and dry. Wipe them down occasionally to prevent dirt buildup. Avoid using harsh chemicals as they might damage the gold finish. If you notice any loose parts, check the installation and tighten them if needed. With proper use and care, these strap locks will serve you well for a long time.