UltraMax ultra-sharp premium Extra Heavy-Duty snap-off black blades, exclusively designed for maximum cutting performance, are ideal for applications where superior sharpness is required.

These blades are made from high quality carbon tool steel are developed using a special double honing process for extreme sharpness and are 25% sharper than our Extra Heavy-Duty HB blades.

Long lasting durable snap-off blade - a new sharp edge with each snap.

Blade container locks for safety. Fits most Extra Heavy-Duty handles. 7 cutting edges per blade.