xTool F1 Ultra 20W Fiber & Diode Dual Laser EngraverxTool F1 Ultra 20W Fiber & Diode Dual Laser Engraver The world's first and best 20W Fiber and 20W Diode Dual Laser. Not only does it expand the range of materials that can be engraved, F1 ultra's 20W high power allows you to do deep engrave, emboss and cut. No computer and internet? No problem! The F1 Ultra touchable control panel stores 7GB of project files and independently controls F1 Ultra to engrave or cut. Deep Engrave Jewelry Batch Production