USB charging mini Sharpening pen Jewelry engraving machine Nail sharpening three-speed speed E108 cordless DIY toolUSB Wireless engraving machines: These engraving tools are equipped with lithium batteries that can be recharged via a USB port. When fully charged, wireless use can be idle for up to 30 minutes. Easily help you complete a better sculpting process.The metal engraving pen is equipped with an excellent motor with power up to 25W at work. 3 gear adjustable speed 5000-25000 rpm, suitable for different occasions. The lowest speed allows you to safely polish your nails, and the highest speed can also be used for metal carving. Various grinding pointsThese metal engraving machine kits include rotary bits, drill bits and saw blades, all of which are sufficient for engraving, engraving, grinding, polishing, etching, milling, grinding, drilling and cutting.Start carving art now: These portable compact etching pens are easy to carry around, allowing you to enjoy a relaxing time making handmade diamond jewelry. It can work on metal, glass, ceramic, leather, wood, jewelry, stone or statues. Best choice for beginners: Our metal carving tools are easy to operate and are especially suitable for beginners