As easy to use as a sharpened pencil. This precise etcher uses a 20,000 rpm motor and standard 3/32" Diamond engraving bit to etch on metal, plastic, ceramic and glass. Use a light touch. Precision tip, lightweight aluminum body and slim profile allows even intricate script and complicated designs in hard or brittle surfaces. Great for permanently identifying tools, toys, jewelry and valuables. Finger tip control on/off button. Works best while running at high speed, using a light, flowing touch. 2 AAA batteries included. Weighs only 2 oz.