Chef'sChoice Model 120 Knife Sharpener

The Model 120 is designed for 20-degree class knives, which includes most standard kitchen cutlery. It works on both straight-edge and serrated blades, but it is not suitable for single-bevel knives like traditional Japanese sushi blades.

The three-stage process uses diamond abrasives to create a triple-beveled, arch-shaped edge. This geometry is significantly stronger and more durable than a traditional hollow-ground or V-shaped edge, helping your knives stay sharper for longer.

No, you do not need to worry about the angle. The unit features integrated precision guides that automatically hold the blade at the correct 20-degree angle, removing the guesswork and ensuring a consistent edge every time.

The third stage uses patented stropping disks to polish the edge after the initial sharpening. This step refines the blade, removes any microscopic burrs, and creates a razor-sharp, smooth finish.

You should only use the coarse stage when your knife is dull or has visible damage that needs reshaping. For routine maintenance and regular sharpening, you can skip the coarse stage and start directly with the medium sharpening stage.

Yes, it is designed to sharpen serrated blades. However, you should only use the third stage (the stropping stage) for serrated knives, as the coarse and medium stages can remove too much metal from the serrations.