POWER: The powerful 20000 rpm motor of the engraving pen is powered by only 2 AAA batteries and can engrave on metal, wood, plastic, leather, metal, ceramics and plastic. HIGH QUALITY: The head of the pen engraving machine (1mm) is made of high-strength diamond, which is super wear-resistant and shock-resistant, and has a longer service life. electric engraver pen The body is made of aluminum. The compact engraver has an ergonomic tri-lobal handle and precise fingertip control. EASY TO USE: Hold the DIY engraver pen like a pencil with your thumb over the control button, applying a light pressure on surfaces. LIGHTWEIGHT AND ERGONOMIC DESIGN: Cordless engraving pen small in size, lightweight and easy to carry, you can hold the precision carving engraving tools like a pen to do work complex without undue stress on your wrist or hand. NO BATTERY: The mini engraving pen is portable. Electric Engraver Pen Pocket clip design is convenient to carry. Due to delivery safety, there is no battery (should be AAA) inside.