As seen on TV. Sharpens everything with ease! Cutting edge technology - works on serrated blades. Makes old dull blades sharp as new. Ergonomically designed for left and right handed people. Tungsten carbide steel sharpening blades. The only sharpener that sharpens serrated knives. Cutlery; Scissors; Tools; Equipment; Machinery; Appliances. Complete instructions included. Don't discard them - Sharpen them!