The superior sharpness of these OLFA® blades, coupled with the fact that you can snap off dulled edges, makes them the choice for professionals and do-it-yourselfers alike. Use these blades for construction, including drywall, linoleum, carpet, flooring, insulation, conduit and roofing materials. Good For: Applications such as flooring, drywall and roofing repair or replacement. Cuts carpeting, linoleum, drywall, roofing shingles and more.