Quantity: 1set USB Wireless Engraving Machine: These engraving tools are equipped with lithium batteries, which can be charged through the USB interface. After being fully charged, cordless use can be idle for up to 30 minutes. Easily help you complete a better engravingprocess. The metal engraving pen is equipped with an excellent motor. 3-speed adjustable speed 5000-10000-18000 rpm, suitable for different occasions. The lowest speed is safe for you to polish your nails, and the highest speed can also be used for metal engraving. Various Grinding Heads: These metal engraving machine kits include rotary drill bits, drill bits and saw blades, all of which are sufficient for carving, engraving, grinding, polishing, engraving, milling, grinding, drilling and cutting. Start the art of carving now: these portable and compact engraving pens can be easily carried with you, allowing you to enjoy the easy time of handmade diamond jewelry making. It can work on metal, glass, ceramics, leather, wood, jewelry, stone or statues. The best choice for beginners: Our metal carving tools are easy to use and especially suitable for beginners.