You can finally work on all those awkward corners edges gaps recesses or other hard to reach areas the westfalia 400w electric file is equipped with 2 interchangeable grinding arms 8mm or 13mm width and ideal for grinding filing removing rust of a variety of materials like wood ceramic metal plastic or glossy surfaces with the electronic adjuster you can a select the correct speed required for the item you are working on delivery includes 12 abrasive belts 2 x k40 8 mm 2 x k40 13