Features: Powerful speed setting ventilation: Up to 30000 rpm speed that makes your artwork DIY creation a quite easy thing, while the vent holes on the body effectively dissipate the heat released when the power rotary tool is running, extending battery life for a long-term and safe use. Recessed power button design: With the grooves power button design, you no longer have to worry about the rotary tool being stopped due to accidental touches on the switch, all the engraving/polishing work is done with nonstop. Great for DIY and professionals alike Precise control for multiple uses: Whenever you are thinking of: engraving, sharpening, grinding, polishing or sanding, you will find this power rotary set a must-have for your handy light artwork creation with optimum precision and control. It is suitable for wood, plastic, tile, glass, stone, metals, etc Overcharge protection: And built-in overcharge protection, it is still well protected even you forget to take it off from your wall outlets when it is fully charged. Tips: Not for heavy duty projects. Check the collet size before you put the correct head on Specification: Material: plasticmetal Input power: 24W No-load speed: 30000 rpm Grinding head diameter: 3 mm Package List: 1 x Mini Small Electric Drill Set