Culina Handheld Knife Sharpener 3-stage Professional Knife-sharpening System for Knives in All Sizes Razor sharp results. Portable, quick, and easy to use. 3 pair sharpening wheels get you more cutting-edge, all-size blades in one device. Rest blades between the wheels, sharpen in seconds with simple back-and-forth motion. Straightforward for all users (professionals or home). Better performance: prevents blades' metal from thinning unlike electric sharpener (which tend to destroy knives by stripping more metal). Ceramic wheels: robust construction, durable service, consistency over time. Rubber lined ergonomic handle for safe, secure hold. 100% Culina Satisfaction Guarantee