ZWILLING J.A. Henckels 39134-000 ZWILLING Knives Steak Knife Set, Brown/Stainless Steel Inverted blade serration for a prolonged cutting edge Inverted serration gives you the smooth cut of a fine edge blade that will stay sharp over years of use This high and low serration distributes blade wear and tear throughout a two-step process; delaying potential dulling As the larger teeth wear down on hard ceramic surfaces the smaller teeth between remain sharp.