1EASY TO REPLACE: The grinding head of the electric micro engraver pen can be removed directly manually, easier to replace 2BEAUTIFUL AND USEFUL: 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 3WIDE 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 4SUPPORTED FUNCTIONS: Electric micro etching pen can be used for grinding, polishing, engraving, drilling, cutting, cleaning, very versatile 5TECHNICAL PARAMETERS: Electric micro engraver speed is 1000020000r/min, power for 10W, input voltage is 5V2A