www.Gerber-Tools.com http www.Kershaw-Knives.net http The video shows a YAG laser engraving on the 420J2 steel blade of a SOG Vulcan Tanto VL-03. The engraving is crisp and dark, just like people want it. Unlike ordinary CO2 lasers that involve putting chemicals on the engraving surface, our YAG laser burns directly on the metal.