Roof Zone Shingle Cutters remove the headache from cutting asphalt shingles with a standard utility knife. The Core Cutter is a small, lightweight tool that obtains core samples from substrates for determining moisture content or other analysis. The Shingle Shaper allows for a faster and more accurate of a cut in any asphalt shingle. It will help you reduce the number of missed cuts on a shingle and save up to several hours of being on a roof. Roof Zone's Shingle Shaper comes with rubber feet for better grip and traction on the roof top, as well as 1 blade. Additional Shingle Shaper replacement blades are available for separate purchase.