Patented Knife Sharpening Guide - Get Perfect Sharpening Angle Simple, easy-to-use and highly effective knife sharpening accessory Knife blade slides into glide to set blade at correct angle against honing stone (not included) Embedded ceramic rods on each side slide over abrasive surface to prevent damage Use with fine steel blades - great for ceramic knives. Durable ABS material, 4"W x 1"D x 5/8"H Works with all honing stones (aluminum oxide, etc.) including diamond surfaces