Smith's Gourmet Slide-Sharp 4-stage knife sharpener is designed with two pre-set domesitc angle slots and 2 pre-set angle slots for Ansian style knives. The domestic side is designed with pre-set angle slots with both carbide blades, perfect for bringing your dull and damaged knives back to life, and ceramic blades for those quick touch-ups and polishing of already sharpened knives. The Asian pre-set angle slots are designed with pre-set angle slots with both Diamond blades, perfect for bringing your dull and damaged knives back to life, and ceramic blades for those quick touch-ups and polishing of already sharpened knives.The Slide-Sharp has a non-slip base giving you added stability while sharpening your straight edge knives and Smith?s patented Edge Grip technology allows for sharpening on a table or countertop edge to prevent your larger knives from dragging over the surface.