Our portable DIY electric engraving pens contain stainless steel, plastic. It can combine the benefits of durability, lightness and safety to ensure long-term use while providing a comfortable holding experience. How to use it is simple: you need to buy two number 5 batteries and install them. Press the white button to carve the pattern on the surface you want to carve. Stainless steel material durable, long service life. Plastic case, light and safe, comfortable to hold.