Chef&rsquo;sChoice 290 AngleSelect Hybrid Diamond Hone Knife Sharpener Combines Electric and Manual Sharpening for Straight and Serrated Knives with Patented Finishing Stage Made in USA, 3-Stage, Black ALL STYLES OF KNIVES: Hybrid AngleSelect technology for razor sharp edges on all your knives, including European/American 20-degree knives, Asian style 15-degree knives, straight and serrated blades, and sport and pocket knives HYBRID SHARPENER: Combining electric and manual sharpening stages for an extremely sharp, arch-shaped edge that is stronger and more durable ADVANCED SHARPENING: Efficient CrissCross sharpening technology and diamond abrasive wheels sharpen simultaneously to create a highly effective, extremely sharp, burr-free, durable edge DIAMONDS: 100 percent diamond abrasives in Stages 1, 2 and 3 and ultra-fine diamond abrasives in Stage 3 ensure a super sharp, polished edge PRECISION: Angle guides for precise sharpening EASY TO USE: The Hybrid sharpener requires no guesswork and will quickly sharpen even the dullest of knives STAINLESS STEEL: Elegant and durable brushed stainless steel cover Engineered and assembled in the USA