Using your Makita 4-1/2 inch Segmented Rim Diamond Blade is easy. First, make sure your angle grinder is turned off and unplugged. Attach the blade securely to the grinder according to the grinder's instructions. You can use this blade for both dry and wet cutting. For wet cutting, connect a water source to keep the blade cool and reduce dust. When you're ready to cut, switch on the grinder and gently guide it through the material. Make sure to keep a steady hand and let the blade do the work. As for maintenance, after each use, clean the blade to remove any debris. Check the blade regularly for signs of wear or damage. If the blade is chipped or worn out, replace it immediately. Also, always operate the blade within its maximum RPM of 13,800 to ensure safety and optimal performance.