ROLLINGDOG's wall sander with comfortable ergonomic * will help you smooth out drywall and other flat surfaces quickly. For most effective use tear one 9x11" sheet of sandpaper into 3 sections, loosen wing nuts on each side and install the 3 sections of sandpaper onto the sander. As soon as one piece is used up remove it to begin using the new strip of sandpaper below it. Solid construction aluminum base plate with foam pad helps evenly apply pressure to surface. With the ergonomic handle you will be able to work longer with less fatigue.