Chef&rsquo;sChoice 320 Diamond Hone FlexHone/Strop Professional Electric 2-Stage Knife Sharpener for Straight and Serrated Knives Diamond Abrasives Made in USA, Platinum Unique patented stropping and polishing stage Two-stage sharpening for durable, longer-lasting edges 100-Percent diamond honing; guaranteed to never detemper Precision elastomeric spring guides hold blade at the proper angle Totally safe for quality knives