Furi Neustahl Knife Sharpener and Honer Quickly, easily and professionally sharpens and hones all regular straight edge knives including Chef, Paring and Santoku knives One molded plastic piece, utilizing patented Diamond Finger technology 400 Grit industrial grade diamonds on all fingers set at a 40 angle (20 each side, taking the guesswork out of sharpening on a traditional steel Whenever knives are dull, simply swipe them through the Diamond Fingers of Neustahl Standard in all Furi Knife Block sets