Convex Carbides quickly sharpen kitchen knives and establish a gentle convex edge shape for maintaining a sharp edge longer. Ceramic honing wheel refines the edge on your kitchen knives, and can be used daily to maintain a sharp edge. Contoured base for sharpening on counter top or edge of the counter and Rubber base and rubber grip for safe and secure sharpening. 3-YEAR WARRANTY: All Work Sharp sharpeners come with a comprehensive 3-year warranty. Each knife & tool sharpener is meticulously designed and quality-checked at our Oregon facility. We proudly stand behind our products. DESIGNED, ENGINEERED, & CALIBRATED IN OREGON: We design, engineer, and calibrate our sharpening machines all under one roof in Ashland, Oregon & ensure our products are sourced from the highest caliber manufacturers, both in the USA and globally. The Work Sharp Kitchen Edge Knife Sharpener is a fast, easy, and effective way to sharpen your kitchen knives. Convex Carbides quickly restore a sharp edge, while the Ceramic Wheels hone the edge back to a factory level of sharpness. The contoured base feature allows the sharpener to be used flat on your countertop or securely on the edge to provide two levels of sharpening control. The soft rubber grip and base provide a safe and comfortable sharpening experience. Compact size easily fits into your kitchen drawer.