Now you can sharpen Asian and German knives with one compact, easy-to-use tool. This handheld sharpener puts a razor-sharp, durable arch-shaped edge on straight and serrated knives. Slot 1 sharpens Asian knives to a 15-degree angle. Slot 2 sharpens European/American knives to a 20-degree angle. Slot 3 polishes the blade edge to a smooth finish, and sharpens serrated blades. Criss-Cross technology uses 100% diamond abrasive wheels that sharpen simultaneously "into" and "out of" the knife edge, for a burr-free edge with lots of bite. Compact size stores away in a drawer. Soft-touch handle for easy, secure grip. Assembled in USA.