Bench sanders may have several different sanding tools built into them, including disc, spindle, and belt sanders. Each type of sanding tool on the bench sander has a different purpose. Disc sanders are good for sanding a lot of surface area in a hurry or stripping paint from old furniture.  Belt sanders can handle rough surfaces, and you can use them to round and shape wood. Spindle sanders are designed to produce a smooth finish on detailed edges and curves, so they’re good for fine carpentry and refinishing furniture.