Chef&rsquo;sChoice 15 Trizor XV EdgeSelect Professional Electric Knife Sharpener for Straight and Serrated Knives Diamond Abrasives Patented Sharpening System Made in USA, 3-Stage, Gray CONVERT YOUR KNIVES: Ideal for converting traditional 20-degree factory edges of household knives into high performance Trizor XV 15-degree edges DIAMONDS: Advanced stropping stage and 100 percent diamond abrasives for sharpening straight edge and serrated blades. Noise is between 65 dB and 75 dB EASY TO USE: Advanced, patented flexible spring guides for automatic adjustment and accurate control of the sharpening angle and feature simple on/off switch THREE STAGES: 3-Stage EdgeSelect sharpening system for optimum versatility in providing the perfect edge for each cutting task. Stages 1 and 2 are plated with 100-percent diamond abrasives to sharpen and hone the edge and stage 3 uses a patented flexible abrasive system to polish and help prolong the life of serrated knives RAZOR SHARP: The 15 Trizor XV combines the strength and durability of the Trizor edge with the flawless, ultra-sharp 15-degree XV technology. Time Required to sharpen is approximately 1 minute for first time sharpening and resharpening is approximately 10 seconds ELECTRIC SHARPENER: Easily apply the astonishingly sharp Trizor XV Edge for ultimate sharpness and effortless cutting 3-year limited warranty. Weight: 4.42 pounds Measures approximately 10 L x 4.25 W x 4.25 H inches