1、EASY TO REMOVE: The grinding head of the electric micro engraver pen can be removed directly manually, easier to replace 2、BEAUTIFUL AND PRACTICAL: Electric grinding pen is designed and made of excellent stainless steel and brass. With a small body and high power, the grinding pen is not only looks exquisite and beautiful, but also has a pen like writing experience 3、WIDE RANGE OF APPLICATIONS: Electric engraver can work accurately and comfortably on almost any surface, including glass, metal, wood, plastic, leather, jewelry, etc. Unlimited applications include engraver tools, sporting goods, toys, phone chargers and fine jewelry, watches and glassware. Also available as part of a wood engraving machine or metal engraver kit 4、SUPPORTED FUNCTIONS: Electric micro etching pen can be used for grinding, polishing, engraving, drilling, cutting, cleaning 5、TECHNICAL PARAMETERS: Electric micro engraver speed is 3500‑13000r/min, maximum power 30W, output voltage 3.7V