Chef'sChoice 120 Diamond Hone EdgeSelect Professional Knife Sharpener with Precision Angle Control, 3-Stage, Platinum Electric knife sharpener with precision angle control for Trizor-Plus edge Use with chef's knives, butcher knives, sporting knives, and serrated blades 100-percent diamond abrasives in stages 1 and 2 sharpen and hone Stropping and polishing in stage 3 for hairsplitting sharpness Measures 9-3/4 by 4 by 4-1/4 inches; 3-year warranty