Durasoft, Drywall Rasp With Rails, Removes 45 Percent More Material Per Stroke, Will Not Clog Or Collect Dust, Works In Both Directions, Has Guide Rails To Keep Rasp On Drywall Edge, Long-Lasting Premium Stainless Steel Blade, Contoured Durasoft Handle Ensures A Good Grip, Ends Of Blade Get Into Tight Spaces, Sharp Blade Can Be Used On Other Materials Such As Backer Board & Vinyl Tile.