Proxxon has been a respected name in Europe for many years and now their tools are available in a 115V version for the U.S. market. The Precision Grinder is a step up from the typical hardware store rotary tools available today. It has more power, a smaller body and a smoother running motor. It comes with a drill style chuck that is infinitely adjustable from 1/32_ to 1/8_ or the collet set can be purchased separately. The tool comes complete with 40 accessories as well as a sturdy plastic case. 5,000-20,000 RPM