Using the Makita 198415 - 4 dust extraction cutting guard is quite straightforward. First, make sure your Makita 4 - 1/2 or 5 inches angle grinder (except model 9005B) is turned off and unplugged. Then, quickly install the cutting guard onto the grinder as it's designed for easy installation. When you start cutting, the guard will help extract dust, keeping your work area cleaner. Just remember to use a 5 - inch cutting blade if you want to reach the maximum cutting depth of 1 - 3/8 inches. As for maintenance, regularly check the all - metal construction for any signs of wear or damage. If there's dust buildup, you can clean it with a dry cloth. Always store it in a dry place to prevent rusting. And of course, always follow the safety instructions of your angle grinder when using this guard.