Smith"s Edge Grip 2-Stage Knife Sharpener is lightweight, portable, and easy to use on either a flat surface or the edge of your countertop or table. Carbide blades and crossed ceramic rods feature pre-set sharpening angles that provide the proper sharpening angle every time. Carbide blades (coarse) provide quick edge setting capabilities, and the ceramic rods (fine) are used for the final edge honing. Two stages of sharpening offer the capability to put a razor sharp edge on very dull or damaged blades and touch-up already sharp blades.It comes with non-slip rubber feet and a soft grip rubber handle for comfort and steadiness when sharpening. The V-Grip bottom allows for added stability and comfort when using the sharpener on the edge of your countertop or table.Manual Features: V-Grip Bottom for Use on Edge of Counter Provides Proper Sharpening Angle Every Time Soft Grip Handle for Comfort and Control Sharpening Instructions:Insert knife blade into the appropriate sharpening slot at a 90 degree angle to the sharpener. Pull your knife through the sharpening slot while applying downward pressure on the blade. Repeat this action until your blade is sharp. Caution: Always rest your sharpener on a flat, sturdy surface or on the edge of a countertop or table. Never rest the sharpener on your leg. Keep fingers behind the finger guard or injury could occur.Care: Always clean your sharpener after use. Clean with a damp cloth or nonabrasive brush. Do not rinse with water