... But that's about it unfortunately already. I recently carved with full force against 4-5x a car side window, while I was standing outside the vehicle. I must say that I weigh about 90 kg and my arms are built accordingly. I was not able to pursue the disc with the mandrel. Probably right after the 1st shock was the thorn "flat" and dull. The good for nothing at times.
The other features I could not test.
I also recommend the ResQMe tool. In order for the destruction of car windows is a breeze.