The Proxxon 12V Precision Rotary tool offers special motor technology with full-wave electronic speed control allowing for powerful operation with constant torque, even at low speeds. Designed with a specially balanced permanent magnet motor this tool runs very smooth over extended use under various load conditions. These features are especially important when micro-drilling, brushing, and polishing on delicate materials. The soft grip two-component housing provides comfortable handling with optimal control. The tool requires the use of as 12V transformer (sold seperately). For power supply we recommend Proxxon's MICROMOT transformer NG 2/S or NG 5/E.