Description:These engraving tools are equipped with lithium batteries, which can be charged via the USB interface. After fully charged, it will easily help you to complete a better engraving process.The metal engraving pen is equipped with an excellent motor, and the power is up to 25W when working. 3 gears adjustable 5000-25000 rpm, suitable for different occasions. It allows you to polish your nails safely, and can also be used for metal engraving.These metal engraving machine kits are sufficient for engraving, engraving, grinding, polishing, etching, milling, grinding, drilling, and cutting.These portable and compact etching pens can be easily carried with you, allowing you to enjoy easy time for making hand diamond jewelry. It can work on metal, glass, ceramics, leather, wood, jewelry, stone or statues.Our metal carving tools are easy to operate, especially suitable for beginners. Make keychains, DIY necklaces or use our kits to send gifts.Item Name: Engraving toolAdjustable: 5000-25000r/minPower: 25WSize: 12.4*1.6cmMaterial: Electroplated alloy body + all copper chuckSpecifications:Color: SilverApplication: EngravingVariable: YesUsage: Home DIYQuantity: 1 setNote:-There might belittle error of size for manual measurement.-Thecolors deviation might differ due to different monitor settings, please kindly understand.Packing list1 x Engraving pen30 x Grinding needles3 x Cutting discs2 x Drill bits1 x Post1 x USB cable