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, Brushed Metal Combines the strength and durability of the Trizor edge with the flawless, ultra-sharp 15-degree XV technology. Time Required to Sharpen: Approximately 1 minute for first time sharpening and resharpening approximately 10 seconds Ideal for converting traditional 20-degree factory edges of household knives into high performance Trizor XV edges Advanced, patented flexible spring guides for accurate control of the sharpening angle, 3-Stage EdgeSelect system for optimum versatility in providing the perfect edge for each cutting task Diamonds and advanced stropping stage for sharpening both straight edge and serrated blades Easily apply the astonishingly sharp Trizor XV Edge for ultimate sharpness and effortless cutting Sharpener for American-, European-, and Asian-style knives, including straight edge and serrated Converts 20-degree factory edge into high-performance Trizor 15-degree edge Three stages include diamond abrasives and flexible, abrasive stropping disks Flexible spring guides automatically adjust for the proper angle; simple on/off switch Measures approximately 10 L x 4.25 W x 4.25 H inches, 3-year limited warranty