All of its three water stones are tucked away in one machine—you can cycle through them by turning the wheel: 100 grit for repairing chips, 150 grit for sharpening and maintaining and 320 grit ...

Always be honing If sharpening creates an edge, honing maintains it. Even the sharpest edge is impacted by repeated pressure; as you press down on a knife, the edge gets bent over and misaligned.