Using the DeWalt Universal Edger Attachment DWOAS4ED is quite straightforward. First, attach it to your compatible DEWALT power head. Once attached, you can adjust the 7.5 - inch blade to the desired depth, up to 2.5 inches, depending on the task at hand. When you start cutting, the large guide wheel will help you move the edger smoothly. Keep in mind that the angled head gives you a clear view, so use this feature to your advantage for more accurate work. As for maintenance, after each use, clean the blade to remove any dirt or debris. You can use a soft brush for this. Also, check the blade regularly for signs of wear and tear. If it gets dull, it's a good idea to replace it. Store the edger attachment in a dry place to prevent rusting and keep it in good working condition for a long time.