Description: 【Versatile DIY Tool】: This compact engraving polishing pen is ideal for a variety of DIY projects, including wood carving, metal engraving, jade crafting, and seal carving. Its multifunctional design makes it an essential tool for hobbyists and professionals alike 【Cordless Convenience】: Designed with a battery, this cordless tool offers the freedom to work without being tethered to an outlet. Its portable nature allows you to carry it anywhere and use it anytime, making your crafting projects more flexible 【Powerful Performance】: Equipped with strong grinding capabilities, this pen can handle both rough sanding and intricate detailing with ease. Whether you're working on coarse surfaces or fine engravings, this tool delivers consistent results 【Suitable for Various Materials】: Three speed speed adjustment, capable of working on different materials such as wood, metal, and jade effortlessly. This versatility makes it an ideal choice for diverse crafting needs 【Package】: Engraving Pen x1, USB Cable x1, Polishing Heads x5, Bits x10, Grinding Heads x20, User Manual x1 Specification: Material: Aluminum Chuck diameter: 2.35 mm Power supply voltage: 3.7V Power: 10W No Load speed: 5000 10000 20000 rpm Size Chart: 1.8 cmx1.6 cmx12.6 cm/0.71 inchx0.63 inchx4.96 inch  Package Includes: 1 Grinder 1 USB Cable 5 Polishing Heads 10 Bits 20 Grinding Heads 1 Instruction Manual Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.