An eccentric sander or rotating sander makes 2 motions at the same time: a rotating motion and an eccentric motion. As a result, you can sand quickly and neatly without circle-shaped marks on your furniture. In addition to sanding, it's also possible to polish. With the right polishing sponge, you can make your car, boat, or caravan shine again. Both Makita and Bosch have eccentric sanders. And for extra freedom of movement, choose an eccentric sander with a battery.