The Curve is an incredibly easy to use, high-quality sharpener for quick action. With non-adjustable hones all you need to do is keep your blade flat against the Guide and let the sharpener do the rest. The unique curve in the diamond hones maintains a 25 degree angle throughout the entire blade. Spring loaded diamond hones keep equal pressure on each side while pulling the blade through. FeaturesUnique design maintains 25 degree angle325 Grit Diamond HonesUltra compactEasy to useNo adjustments