I tested the Work Sharp Professional Precision Adjust knife sharpener. Here's how well it sharpened all my knives, including plain edge and serrated, and why I love it.

Work Sharp's sharpener, with its flexible belts, puts a fine edge on your everyday kitchen blades.

From sharpeners to blades, Work Sharp launches its first line of knives — and they're convertible! I tested and converted them in a month of use.