The OLFA UltraSharp black heavy-duty snap-off blades are exclusively designed for maximum cutting performance and are ideal for applications where superior sharpness is required.

Made from a high-quality carbon tool steel, the OLFA black blades are double-honed for extreme sharpness and are 25% sharper than the OLFA silver extra heavy-duty HB blades.

Long lasting, durable snap-off blade - a new sharp edge with just a snap. Blade container locks for safety.

Fits OLFA extra heavy-duty handles. 7 cutting edges per blade.