Belt sanders are very aggressive and high-speed sanders witch are able to remove most of the materials. If you want to remove a lot of material such as paint and varnish , you can use belt sanders. They are also great for shaping and correcting your workpiece like the time you need to make a piece of arc-shaped wood , flat. Belt sanders are heavy-duty tools that are excellent choices for sanding large and flat surfaces. It is better that an experienced person use this tool because controlling it needs experience to avoid damaging workpiece.