13-segment 9mm snap-off blade for general cutting use. Made of high-quality carbon tool steel with a double-honed blade for unparalleled sharpness and superior edge retention. Exact 59° edge angle optimizes cutting power and minimizes blade breakage. The blades are designed to cut through packaging cardboard shrink wrap tape vinyl window film wallpaper caulking paint foam board and other materials. 50-pack of blades.