Hobby Essentials Razor Saw Blade, 4.5x1" 40T/in (HDXK6967) This razor saw blade is surgically sharp and designed with 40 teeth per inch. This blade pairs perfectly with the razor saw set. Precision crafted metal blades make great tools for carving or shaping foam, plastic, wax, clay, balsa wood and more! Warning! Hobby blades are extremely sharp. Use caution and wear safety goggles. Do not bend blade as it can break and cause injury. Features: Pairs great with the Razor Saw Set (HDXK6960) Used for foam core, plastic, cardboard, cork, balsa wood, wax, clay and more! Includes: (1) 4.5 x 1" 40T/in Razor Saw Blade