Uolor 108 Piece Engraving Tool Kit | Wired Multifunctional Electric Micro Engraver Engraving PenUolor Electric Engraving Tool Kit. Uolor Engraver Kit gives you the ability to engrave all of your personal belongings without the cost and time of seeing an engraving specialist. The engraver works on most surfaces (metal, plastic, glass, ceramic, diamond, wood, leather, stone and more) and is a great way to mark your belongings as your own. It is widely used in engraving, carving, sanding, polishing (nail polishing), engraving, routing, grinding,