Design, Overload Protection: This DIY electric engraving pen is equipped with a power indicator, speed indicator, and overload indicator, which can know the usage of the engraving pen in real-time, and you can adjust the working speed you want according to different usage conditions. When the resistance is too large, the overload indicator light is on, and the power supply is automatically cut off for self-protection, avoiding damage to the motor and prolonging the service life. Portable & Easy to Operate: The precise grinding engraver is only 21.5 cm (8.46 inches) long and weighs only 43 g (0.09 lbs), so you can put it in any of and clothing pockets. You can switch and adjust the speed with one key, there are 3 gears in total, the speed of 1-3 gears is 5000-10000-18000 Rpm/Min, you can choose according to your needs. USB Charging Wireless Engraving: Our cordless engraving pen can be used with recharge or connected to a power source and is equipped with a Type-C charging cable for easy and fast charging. 30 minutes can charge to 80%, 1 hour to fully charge; Long-lasting battery used continuously for 1 hour under normal conditions. Complete Accessories: Our metal engraver pen kit includes 1 engraving pen, 30 grinding bits, 2 drilling bits, 1 post, and 3 stainless steel cutting discs,1 wrench, 1 USB cable. Simple and easy to learn, especially suitable for beginners. Make keychains, DIY necklaces, or gifts with our kits. Wide Application: This jewelry engraving machine supports you to engrave, engrave, sand, polish, etch, mill, grind, drill, cut and more on metal, glass, ceramic, leather, wood, jewelry, stone or statues work, allowing you to enjoy a relaxing hand diamond jewelry making time., Manufacturer: Mskidand