The Chefs Choice Trizor XV Edgeselect Sharpener changes the way you sharpen and keep your knives sharp. It allows you to hone and sharpen your knives using 15°XV technology. This sharpener takes 1 minute to sharpen knives for the first time, then only approximately 10 seconds to resharpen thereafter. Complete with a three-stage process and efficient flexible stopping disks that create minimal metal removal. Stage 1 creates extremely fine microgrooves, forming the first major bevel of the arch-shaped edge. Stage 2 uses even finer diamond abrasives on conical disks to shape the second smaller bevel with finer microgrooves. Stage 3 uses the patented flexible abrasive stopping disk system to create a microscopically smooth, sharp edge, forming the third and final bevel while polishing the microgrooves formed in stages 1 and 2. Stage 3 can also be used to sharpen serrated knives. An advanced knife sharpener with patented flexible spring guides for accurate control, this Trizor knife sharpener creates the perfect edge for every cutting task. Made with a 3.12 carat, 100% diamond abrasive, suitable for sharpening both straight and serrated blades. 3-year guarantee.