Ceramic Replacement Honing Rods/Crock Sticks for Idahone and other Knife Sharpeners (White Fine Grit, 2) From the legendary Idahone -- Trusted and used by professional chefs, home chefs and knife enthusiasts Made of top-of-the line high alumina ceramic--the best on the market Grit ratings are approximately 1200-1500 for the fine and 100-200 for the coarse sticks Replacement Rods measure 9" long by 5/16" diameter Sourced and produced in the USA