The Chef's Choice 270 hybrid diamond hone electric knife sharpener provides razor sharp edges with an advanced 3-stage technology, combining electric and manual sharpening (20 degree class). It features the advanced and efficient Criss-Cross sharpening technology. The knife sharpener is used for sharpening straight edge, serrated, kitchen, household, light sport, and pocket knives. The easy-to-use sharpener has a brushed stainless steel sharpening guide along with the gorgeous white finish. Sharpening stage 1 and 2 are electric and stage 3 is for manually honing to ensure razor sharp, arch-shaped edges. The Chef's Choice knife sharpener has 100% diamond abrasives in all 3 stages. The ultra fine diamond abrasives in stage 3 ensure a super sharp as well as polished edge.