This type of sharpener typically features multiple stages, often including slots for coarse sharpening (e.g., tungsten carbide), fine honing (e.g., ceramic), and sometimes even a diamond-coated rod for serrated blades or polishing.
It is designed to restore and maintain the sharpness of various kitchen knives, and some models can also sharpen scissors.
The ergonomic design, often with a handle and non-slip base, aims to provide a safe and easy sharpening experience.