What is a SpyderEdge?

Why does Spyderco manufacture SpyderEdge (serrated) blades?

Because serrations improve cutting ability. The tips of the serrations provide single point penetration at the same time the center of effort rotates around each serration for an infinite number of cutting angles, increasing the cutting edge length by up to 24% (Diagram B). A serration is a sharpened recessed curve along the edge of the blade and has more linear cutting surface than a straight edge in the same space (Diagram A). And, serrations improve edge retention because the tips initiate the cut easing the amount of force required by the recessed edges. The points actually protect the sharp inside curves that continue the cut, thus the curves have less wear over time. Our signature SpyderEdge, also referred to as a two-step serration incorporates a repeated pattern of one large and two small serrations (Diagram B).

There have been many variations of serrated edges produced over the years. Even a properly sharpened plain edge will exhibit vertical scratch patterns with "micro-serrations" that enable the edge to cut efficiently (Diagram C). Overall, the SpyderEdge provides the most efficient cutting performance in a serrated edge. We recommend it for all your aggressive jobs such as cutting rope, seat belts, cardboard, rubber hose and leather. With proper cutting technique, the SpyderEdge can function equally well for fine-skilled tasks such as skinning, cutting paper and slicing. The SpyderEdge is easily maintained with our Tri-Angle Sharpmaker or ProFile sets.