Spyderco 308F Golden Stone Knife, Black
Shaped like a duck foot, the Golden Stone is curved and angled, for sharpening anything with an edge. Holding the stone vertically the stone tilts side to side, lifting one edge up and making a 20 degree sharpening angle for knife blades. Both of the sides are an elliptical edge with a large radius to sharpen PlainEdges and a smaller radius for SpyderEdges. Held vertically on its side, it creates a 12.5 degree angle for scissors and a seam channel running the stone's length hones pointed objects.