Rated "Best Overall" by The Wall Street Journal, this is the electric knife sharpener that resharpens knives in 10 seconds. The device has three slots that each perform different sharpening functions. The first slot sharpens the blade using 100% diamond abrasives, the second forms an edge with microscopic serrations, and the third uses a patented stropping disk to polish the edge. Simply run a knife through each slot twice and the device grinds a double-bevel edge that is stronger and maintains its sharpness longer than the hollow-ground edges produced by lesser sharpeners. The unit automatically maintains the optimal sharpening angle and consistently removes imperfections in the blades, producing an edge that can slice through a tomato's firm skin on the first pass. Accommodates straight-edge, serrated, Asian-style, utility, and sporting knives. Plugs into AC. 4 1/4" H x 9 3/4" W x 4 1/4" D. (4 1/4 lbs.)