May I send in knives purchased elsewhere for sharpening? June 03, 2019 13:31 Updated At this time, we only sharpen F.N. Sharp brand knives. We do not sharpen knives from other manufacturers. Related articles How much does the Sharpening Service cost? What material is the knife handle made out of? I want to return my knife set, what do I do? Where are the knives manufactured? How do I maintain the knives?