OLFA 9070 LBB-10B 18mm UltraSharp Black Snap-Off Heavy-Duty Blade, 10-Pack
Designed For Maximum Cutting Performance And Ideal For Applications Where Superior Sharpness Is Required.  Made From High Quality Carbon Tool Steel, These Blades Use A Special Double Honing Process For Extreme Sharpness, With 8 Cutting Edges Per Blade.