KitchenIQ 0009 50009 Edge Grip 2 Stage Knife Sharpener, Black, Manual Coarse for dull and damaged knives Fine for polishing the knife and for quick touch-ups for an already sharp knife Patented Edge Grip feature allows sharpening on the edge of the table or counter top- prevents the tip of larger knives from dragging over the surface of the counter Compact for easy storage. Carbide blades (Coarse) provide quick edge setting capabilities, and the ceramic rods (Fine) are used for the final edge honing Non-slip base for added stability and control