CRKT Edgie:
Since the dawn of human history, man has dreamed of a knife that would sharpen itself during normal use. Here it is, the patented brainchild of inventor Maj. Howard Pope (USAR Ret.). The secret is a diamond-coated spring sharpener built into the folder frame. The high-carbon stainless steel blade in satin finish features a strong full-width spine for most of its length, dual hollow grinds, and the single cutting edge. Because the internal diamond sharpening strip works on this one edge only, a tiny burr forms, which actually helps cutting action, acting as a microserration. This makes the Edgie tops for cutting cardboard boxes, rope, cord and even ripe tomatoes