UNIMAC Drywall Sander Automatic Vacuum System Gyprock Wall Plaster 1800WThe UNIMAC 1800W Auch series 2 in 1 Drywall Sander Vacuum was designed for sanding larger areas that would be too cumbersome, time consuming and difficult to finish using a traditional hand sander. The powerful 1800W watt dust sealed motor is controlled by aneasy access 6 Speed System that controls the revolutions per minute (RPM) from 1,500 to 3050 per minute. Speeds 1 3 are ideal for soft wall and fine sanding; 3 6 are ideal for hard walls. The