Adjustable 15, 20, and 25 preset sharpening angles 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 Adjustable crossed diamond sharping rods Adjustable crossed ceramic sharping rods Compact for easy storage. Diamond blades (Coarse) provide quick edge setting capabilities, and the ceramic rods (Fine) are used for the final edge honing