New patent Block knife sharpener lifetime guarantee. Block’s Knife Sharpener are a patent America made Knife Sharpener, Great for Sharpening Kitchen knives, Pocket knives, Scissors and for Sharpening Collectible knives. Block’s knife sharpeners honing rods are made to flex so it reline and hone your knife back to it’s original cutting edge’s. Block’s knife sharpeners take very little skill to use. and you can keep your knives sharp like the day you bought them. Block’s knife sharpeners do need some edge to work with. (not for flatten out or fixing destroyed edges). You have a half way descent edge on knife . You should have no problem getting shaving sharp.