The Chef's Choice 220 hybrid diamond hone electric knife sharpener provides razor sharp edges with an advanced hybrid technology, combining electric and manual sharpening (20 degree class). It features the advanced and efficient Criss-Cross sharpening technology for an extremely sharp edge with lots of bite. The knife sharpener is used for sharpening straight edge, serrated, kitchen, light sport, and pocket knives. The easy-to-use sharpener has a brushed stainless steel sharpening guide along with the gorgeous white finish. The sharpener's stage 1 is electric and is for sharpening and the stage 2 is manual and is for honing for an arch-shaped edge that is stronger and more durable. The Chef's Choice knife sharpener has 100% diamond abrasives in both stages.