You mainly use a DEWALT random orbital sander for round and curved surfaces. You can sand powerfully and neatly without leaving stripes. The sanders work corded or cordless. Do you choose a DEWALT sander with 2 batteries? You can work without interruptions. You can very easily replace the sandpaper with the velcro and you can keep your workplace clean with the dust bag. You can adjust the sanding speed for the best result. The sander also doesn't lose power during demanding jobs thanks to the constant speed. With a storage case, you can easily take your random orbital sander with you.