Ultra-Sharp Premium Standard-Duty Snap-Off Black Blades, Exclusively Designed For Maximum Cutting Performance, Are Ideal For Applications Where Superior Sharpness Is Required. These Blades Made From High Quality Carbon Tool Steel Are Developed Using A "special" Double Honing Process For Extreme Sharpness And Are 25% Sharper Than Our Standard-Duty Ab Blades. Long Lasting Durable Snap-Off Blade - A New Sharp Edge With Each Snap. Blade Container Locks For Safety. Fits Most Standard -Duty Handles. 8 Cutting Edges Per Blade.