Performance Tool W50035 DIY Electric Etching Engraving Pen-Perfect Accessory for Crafting, Engrave Carve Tool Steel Jewellery Engraver Pen Fast and easy way to protect your valuables. Suitable for metal, plastic, wood, leather, stone and glass. Includes pointed and round burrs. Requires (2) AA batteries (included). To change/replace tip: Hold tip and pull firmly out of chuck. Press new tip firmly in place.