Clever design: the manual knife sharpener has 3 knife sharpening slots and a professional scissor sharpener, the revolutionary 4-stage system allows for coarse grinding, repairing, fine grinding and polishing with a single device. A great tool: the handle is ergonomically shaped. Advantage, without having to transform your hand into a vice, you have a secure grip on the tool whose work surface is in wood, stone or glass.Simple and sharp in this great kitchen gadget! Durable, safe and convenient to use: quick and easy adjustment of the optimal angle for sharpening axes and knives by simply sliding the inside, moving the blades in the pulling and pushing directions, automatic guiding of the blade thanks to the special ceramic sharpening head. Precaution:the sharpener knife blade is not intended for sharpening a serrated knife or ceramic knife, but a fruit knife, kitchen knife, cleaver, scissors, etc. Do not apply excessive force or pull back and forth during operation. Useful: Stop throwing away dull knives or dull scissors. These knife sharpening scissors transform blades from coarse to finely sharpened so they are like new or better .With an easy-grip handle, they are suitable for both right- and left-handed users.