Features 1. Personalize Your Project: Use craftsmen to turn boring old projects into new and interesting things in just a few minutes! Make your project stand out. 2. Used in Everything: Artisan pens can be used to drill holes or carve on glass, wood, crystals, steel, jade, wood, sea glass, jewelry, ceramics, stones, gemstones, leather, eggs, plastics, and more! 3. Easy To Do: Just install it like any other typical drill bit and you can take some great actions. 4. Wide Compatibility: The universal handle is suitable for most drilling tools, and there are multiple drill sizes to choose from to meet your carving needs! 5. Durable: An ultra durable carving drill bit. They can withstand intense and extensive use. An excellent tool for daily and repeated use. Specification Clamping diameter: 2.35mm Power: 15W Battery capacity: 500mAh Power supply voltage: 3.7V Idle speed: 6000-12000-25000 Material: Aluminum housing Color: Green Size: 12 x 3 x 3 cm Weight: 110 g, 130 g, 210 g Package Include: 1x Electric Charging Polishing Pen