The Fein die grinder model # GSZ 8-90 PEL has a powerful 710 watt motor and a variable speed range of 2,500 -9,000 RPM's which will allow you to use this grinder for a variety of applications including material removal to polishing. Stainless steel is an ideal application for these speeds. The grinder includes a patented 1/4" collet and removal wrenches. The collet is hardened and is patented to never allow the abrasive to get stuck in the tooling again. Very ergonomic die grinders with high depth of immersion for light grinding and polishing at hard to reach spots. Metal dust protection on field package, armature and electronics. Longest lasting brush in the industry due to patented technology. Also includes a Constant electronics POWERtronic with overload protection Powerful which helps maintain power under loads. This allows the grinder to continue to maintain its RPM's under load. Made in Germany for long life and power you need all day long.