Heavy duty. Howard Rotavator, see manufacturers picture for details.
Have had the machine for 10 years and has been kept inside. Obviously it has sat out for many years. As you can see on top of the sheet metal. Sheet metal crack hasn't changed, since I bought her. Nor is there any vibration. Please TEXT me for video. I used the machine 2 hours once a year and put her away. See video for demonstration, purpose only going through solid clay field that I know hasn't been plowed in a half century I've lived here. If someone wants, she will turn their garden into potting soil in no time.