The Festool ES125eq is a compact, stepless variable speed, Random Orbit Sander (ROS). The speed can be varied between 6,000 - 13,000 orbits per minute, the orbit size is 2.5mm. The sander also incorporates a pad brake to prevent scratches when the tool is lifted or placed onto the work. This is one of the more economical sanders made by Festool.

The ES125eq comes in its own carrying case (called a Systainer) along with a dust bag and a single piece of sandpaper. The Systainer case can be latched together to transport several tools or other items in a group or even latched onto the Festool brand Dust Extractors. In the case of the ES125eq Systainer, there is enough room left in the unit to easily store several pads of sandpaper as well.