Features:1. Made of good quality high dense ABS plastic material, sturdy, durable and lightweight.2. Can help you to sharpen your knife with a perfect angle on the grinder, which is labor-saving and convenient.3. Unique ceramic protective layer protect ht guide with longer durability.4. Easy to use with sharpening stones for fast precision sharpening.5. Good tool for outdoor or kitchen uses, useful and portable.Specification:Material: PlasticColor: Black Size: Approx. 100*16 mm / 3.94*0.63 inchSuitable for: Knife with blade >/= 100mm in length & < 4mm in thicknessWeight: Approx. 20 gPackage List:1 * Knife Sharping GuideHow to use:1. Fix angle guide to the appropriate location of knife blade.2.Both hands hold the handle and the back of the knife, ceramic part contact the surface of whets tone or diamond, make knife blade into a fixed angle, move the blade, back and forth over the sharpener by using little pressure.