All Chef's Choice® sharpeners use 100% diamond abrasives. Diamonds are the hardest known material and will sharpen any knife regardless of alloy. Diamonds are tough and durable and diamonds will never detemper a edge.
·Razor sharp, double bevel edges- tip to bolster
·2-stage 100% diamond abrasives
·Patented BiLevel® magnetic guides for easy, foolproof sharpening
·For kitchen, household, filet and pocket knives
·One-year limited warranty
·Made in the U.S.A.