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