Smith’s “10 Second” Knife Sharpener features a specially designed “V” shaped sharpening slot with two crossed carbide blades that allow you to put a quick edge on your knife with just three or four strokes. The carbide blades are pre-set so that you get the correct sharpening angle every time. They are also reversible for extended life and are replaceable. Sharpener features an easy to use scissors sharpener to quickly put an edge on most househould scissors, including kitchen shears.