8500-15000-21000rpm Mini Electric Drill Grinder Engraver Pen 25pcs Electric Rotary Tool Grinding Machine for Metal Wood Home DIY Features: 1.Comfortable grip, well-designed carving pen allows you to use it as a pencil for a comfortable feel, better control, and precise carving.2.Reliable quality made of high-strength metal and selected electronic components, with wear resistance, wear resistance, and long service life.3.Easy to use wirele engraving pen can work normally even without a plug, eliminating the problem of wire confusion.4.High efficiency. The speed of this carving pen is as high as 5000-25000r/min, and the carving effect is efficient. It is adjustable in three levels, making carving easier.5.The USB rechargeable engraving pen is powered by a 2000mah lithium battery and can be charged and used. No longer requires disposable batteries!6.Wide application range: The pen can be used for carving metal, ceramics, wood, pebbles, plastics, etc., suitable for DIY projects or proce purposes. Parameters: Type: Engraving PenFixture: 3.0-2.35mmSpeed adjustment: adjustable in three gearsSpeed: 8500-15000-21000r/minPower supply: USB chargingVoltage: 3.7VPower: 80WColor: GraySize: 18 * 6 * 4.5cmCharging interface: USB/typeCharging voltage: 5V 2A Package include: 1 * Engraving pen1 * USB charging cable1 * Instructions1 * 22 kit Be careful: 1.Due to the differences between different displays, the images may not reflect the actual color of the item. We guarantee that the style is the same as shown in the picture.2.Due to differences in manual measurements, please allow for slight size differences.