This highly-acclaimed professional 3-Stage EdgeSelect electric knife sharpener combines the strength and durability of the triple-bevel Trizor edge with the flawless, ultra-sharp 15? XV EdgeSelect technology to sharpen both fine edge and serrated knives. It's the ideal sharpener for converting 20 degree class knife factory edges into the high performance Trizor XV 15 degree edge; and will also flawlessly sharpen double-bevel or single-bevel 15 degree class knives. It features advanced, flexible spring guides that provide accurate control of the sharpening angle, for the thickest or thinnest knife blades, insuring ultra-sharp edges quickly and easily! Its 3-Stage EdgeSelect system provides optimum versatility in providing the perfect edge for each cutting task. Combines the strength and durability of the Trizor edge with the flawless, ultra-sharp 15XV technology Ideal for converting traditional 20 degree factory edges of household knives into high performance Trizor XV 15 degree 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 100% diamonds and advanced stropping stage For sharpening both straight edge and serrated blades