A. The wireless engraving tool can be charged via USB. After a full charge, it can be used wirelessly for 30 - 60 minutes in the idle state, which may meet the needs of most of your DIY projects anytime and anywhere. This DIY tool kit comes with various accessories and can be used for engraving, hollowing out, sanding, polishing, milling, grinding, drilling, etc. B. The metal engraving pen has three speed settings available for adjustment, with a speed range of (5000 - 10000 - 18000 revolutions per minute) to adapt to different usage scenarios. The lowest speed allows you to safely file your nails, and the highest speed can be used for metal engraving. It is suitable for creating your masterpieces or family gifts. You can even give this engraving pen kit as a gift separately. C. The portable handheld etching machine enables both DIY enthusiasts and professional technicians to perform precise wireless engraving and leave permanent identification marks. The engraving tool kit includes 1 engraving pen, 20 drill bits, 3 stainless - steel cutting discs (sizes: 22 mm, 25 mm, 32 mm), 1 thimble, 16 templates, and 1 USB power cord. The electric engraving pen may meet all your needs. D. This wireless tool is held like a pen, featuring an ergonomic spherical grip and fingertip control design. The soft rubber - coated handle can reduce fatigue during operation and provide a comfortable and precise operating experience. E. Color: Silver F. Material: Metal G. Package contents: 1 set of engraving pen H. Only the above - mentioned package contents are included, and other products are not included. I. Note: Light reflection and different displays may cause slight differences between the color of the item and the actual product. A measurement error of +/- 1 - 3 cm is allowed.