The AccuSharp® SturdyMount® Knife Sharpener mounts easily to cutting boards” kitchen counters” filet boards” workbenches” butcher blocks” cleaning tables; you name it. No messy oils or stones. The diamond-honed tungsten carbide blades are reversible and will give you an excellent sharpening finish for 5 to 10 years of normal household use. A durable ABS plastic body and stainless steel screws make the SturdyMount® Knife Sharpener ideal for indoor and outdoor use.