USB Wireless Engraving Machine: These engraving tools are equipped with lithium batteries, which can be charged via the USB interface. After being fully charged, cordless use can be idle for up to 30 minutes. Easily help you complete a better engraving process. The metal engraving pen is equipped with an excellent motor, and the power can be up to 25W when it is working. 3-speed adjustable speed 5000-25000 rpm, suitable for different occasions. The lowest speed allows you to polish your nails safely, 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 engraving, 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 around with you, letting you enjoy the easy time of making diamond jewelry by hand. It can work on metal, glass, ceramics, leather, wood, jewelry, stone or statues. Best choice for beginners: Our metal carving tools are easy to use and particularly suitable for beginners.