Microprocessor electronics feature speed preselection and speed stabilization through a tachogenerator, along with soft start, restart lock after power failure, overload protection, and temperature monitoring. The unique tool attachment includes a quick coupling for tool-free changes of system attachments for satin finishing and pipe belt grinding. The attachment for satin finishing is variably adjustable, allowing work close to the edge and is also suitable for narrow rollers, including a rip fence. Tool-free grinding tool changes are facilitated by a patented quick-change system. A fully encapsulated electronic module prevents damage from dust, while a three-fold winding protection reduces motor wear and extends service life. The adjustable protective hood accommodates grinding tools up to 125 mm in diameter. Additional features include a single pole switch and spindle lock. This tool is ideal for processing various materials for satin finishing, structuring, polishing, brushing, smoothing, derusting, and deburring of steel and stainless steel surfaces.