Portable Precision Electric Engraving Pen Engraver DIY Carve Graver Machine Tools Battery Powered with Strong Diamond Tip Bit for Jewellery Metal Plastic Glass Ceramic Stone Engraving Educational Accessory Features: The engraving pen adopts Japanese motor, which can reach 18,000 RPM. Suitable for engraving any surface like metal, wood, glass, stone, ceramics and hard material object. With strong diamond tip, the engraving pen can be used for painting, polishing, engraving, trimming, marking, grinding. Powered by 4 * AA batteries, easy e. (The batteries are not included.) Ergonomic design, comfortable hand feel. Portable and lightweight, easy to carry. A great DIY engraving tool or gift for engraving enthusiasts, artists, beginners, etc. How e: 1.Put the batteries in the battery case and connect with the engraving pen. 2.Push the red button on the engraving pen, and then it can start to work. Specifications: Color: Black Material: Plastic + Diamond Tip Battery Operated: Powered by 4 * AA Batteries(Not included) Application: Metal/Wood/Glass/Stone/Ceramics/Hard Material Surface Item Size: 16.0 * 2.3cm / 6.3 * 0.9in Item Weight: 41g / 1.4oz Package Size: 11.7 * 19.8 * 2.8cm / 4.6 * 7.8 * 1.1in Package Weight: 126g / 4.4oz Notes: Please allow 1-3mm error due to manual measurement. Do not touch the diamond tip when the engraving pen is working. Package List: 1 * Engraving Pen 1 * Battery Case