Feature: 1. Convenient Battery Charging: The electric engraving pen uses a 3.7V, 10440 rechargeable lithium battery and comes with a charger. This ensures durability and provides convenience in your usage. 2. All Metal Body: The engraving pen's body is made of 304 stainless steel material, rust resistant and has high hardness. Its pen style design enhances the tactile experience of engraving. 3. Easy to Hold and Control: The ergonomic handle design and precise pen tip control allow for a pen like grip, making it easy to tackle complex tasks with control and ease. 4. One Button Switch: The sensitive switch allows for easy operation. It can be used for engraving, drawing, trimming, cutting, grinding, drilling, DIY, and more. 5. Wide Range of Applications: This engraving tool kit is suitable for engraving and grinding various materials such as jewelry, diamonds, pear wood, beads, leather, metal, plastic, and more. Specification: Item Type: Electric Engraving Pen Material: 304 Stainless steelLithium Battery: 10440 x 1 350mAh (built in). Package List: 1 x Electric Engraving Pen1 x Charger1 x Screwdriver1 x Brush Head2 x Grinding Head4 x Engraving Knife Head1 x Plastic Box