Using these Fischer 538242 duopower wall plugs is easy. First, drill a hole in the wall that matches the size of the plug. Then, insert the plug into the hole. The narrow edge design will help keep it in place. When you insert the anchor into the plug, you'll start to feel it fitting well. For solid materials, the expansion feature will work to secure it. For hollow and panel materials, the folding/knotting mechanism will kick in. As for maintenance, there's not much to do. Just make sure the area around the plug stays clean. Avoid using excessive force when inserting or removing items from the anchor. Also, keep them in a dry place to prevent any damage.