20W Powerful Engraving Pen: The engraving pen is equipped with a 650mAh battery, it can work completely via USB for 120 minutes, and the full-load working time is 40 minutes, with automatic power-off and overload protection to extend the service life. 3-Speed switchable: The jewelry engraving pen motor provides 20W power with three adjustable speed settings, LED light display, and a speed range of 5000-15000r/min. Perfect for DIY, crafts and light projects, it's perfect for small and tasks.Beginner Friendly: The DIY pen is great for beginners, making carving as easy as writing. Perfect for both DIY projects and nail polish. When you use it for the first time, start with a low speed mode and gradually increase the speed. Easy to use: The compact design of the pen makes it easy to carry, allowing you to start your DIY program anywhere and anytime. It is versatile and can be used to engrave metal, glass, ceramic, leather, wood, jewelry, stone or plastic. What you get: Carving pen set includes 30 carving drill bits, 3 saw blade drill bits, 1 connecting rod, 6 drill bit adapters, 6 punching drill bits, 5 polishing drill bits , 3 stencils and 1 -USB charging cable. Color: As shown in the picture. Material: Metal. Package contents: 1 set * wood engraving pen. . The permissible measurement error is +/- 1-3cm.