Using the OX Ultimate Professional Diamond Blade for Porcelain Tiles is straightforward. First, make sure your handheld cutoff saw is suitable for the blade size (either 12” or 14”). Install the blade carefully according to the saw's instructions. When cutting, apply steady pressure and let the blade do the work. For best results, cut at a moderate speed. As for safety, always wear safety goggles and gloves to protect yourself from debris. Also, ensure the saw is turned off before making any adjustments to the blade. When it comes to maintenance, after each use, clean the blade with a soft brush to remove any tile dust. Store the blade in a dry place to prevent rusting. If you notice the blade is not cutting as efficiently, it might be time to replace it.