Laser straight panels with almost no mess when using the Eastwood Contour DSB Dustless Sanding Block System. No reason to wait for a perfect day to sand outside. Sand inside without worrying about rain, cold, hot sun or other elements that delay your project. Get great results with the benefit of a clean workspace. Specially designed Contour DSB Sandpaper has holes that align perfectly with the holes in the sanding blocks. Paper is available in seven standard grits from 40 to 400 and is designed for dry sanding and getting the best finish in filler and primers. When sanding body filler start with 40 or 80 grit and progress through finer grits.