Convex-carbide - quickly creates a durable convex cutting edge on any knife/ steel Controlled sharpening - pivot response follows the curve of the knife for a consistent angle and edge across the entire blade. Sharpening Angles 25° Ceramic hone - hones/ re-sharpens any blade steel quickly and easily with just a few passes Diamond taper rod - sharpens serrations and fine edge tools with durable medium grit diamond On the go - compact, easy to use knife sharpener to quickly and easily maintain any knife edge anywhere, anytime