Kullens

The Kullenschliff Edge (Also known as kullens, hollows and grantons)

Smooth, fine edges are given a kullens edge by grinding slightly oval depressions in a row along the side of the blade just above the edge. By nature, anything being cut is attracted to the side of the blade by tension. By removing a flat blade surface, the tension reduces, facilitating and allowing a thinner, more precise cut. A kullenschliff edge performs best on carving and slicing knives.