Using the Bosch DBX4543S diamond blades is a breeze. First, make sure your angle grinder is turned off and unplugged. If your grinder has an X - LOCK system, simply snap the blade onto the grinder - you'll hear a satisfying click to confirm it's properly attached. There's no need for any extra tools like a spanner wrench or flange nuts. When you're done and need to change the blade, just pull the lever on the grinder. For cutting, these blades work great on most common ceramic and stone tile materials. Just apply a steady pressure and let the blade do its job. As for maintenance, after each use, wipe the blade clean with a dry cloth to remove any debris. Store the blades in a dry place to prevent rusting. Also, always check the blade for any signs of damage before using it. If you notice any cracks or excessive wear, it's time to replace the blade for your safety and the best cutting results.