High Precision & Low Vibration: This mini rotary tool offers excellent concentricity with minimal vibration, ensuring smooth and accurate operation for various tasks like grinding, polishing, and engraving Cordless Design for Mobility: Experience the freedom of movement with the cordless design, allowing you to work anywhere without the hassle of tangled cords. Ideal for both indoor and outdoor projects Versatile Collet Sizes: The tool includes a range of 6 copper chucks (0.5-3.0mm), providing compatibility with a wide array of bits and attachments, making it perfect for detailed and delicate work Convenient Charging: Built-in with 700mAh battery, this rotary tool ensures easy and safe recharging, so you're always ready to tackle your next project Adjustable 3-Speed Settings: Customize your work with three adjustable speed settings, allowing you to adapt the tool’s performance to different materials and tasks for more efficient and precise results Specifications: Voltage: 3.6V Battery capacity: 700mAh No-load speed: 5000/10000/15000rpm Chuck size: 2.35mm (chuck can be replaced by yourself)