Chef's Choice 300 Diamond Hone Knife Sharpener, White
This electric sharpener is so simple to use that knives  practically sharpen themselves. It puts a professional-style edge on  any kitchen or sporting knife (except serrated knives). Because  magnetic guides hold a blade at the proper angles, no guesswork is  involved. You simply grip your knife loosely and pull it lightly  through the sharpener's slots without pressing down. Key to this knife  sharpener's performance is the two different stages: the sharpening  stage and the second honing stage, which polishes the blade to a razor  edge. Those two stages create different bevels, putting a "shoulder" on  an edge instead of sharpening with a single bevel. The shoulder  strengthens the edge so it lasts longer. For each stage there is a pair  of slots, and the slots use 100 percent diamond abrasives for hardness.  The sharpener measures 7 inches long, 4-1/4 inches high, and 3-3/4  inches deep and carries a two-year warranty against defects.--Fred  Brack