Form of knife:
Advantage: The knife needs a little bit less power to get into extreme dry grassilage.
Disadvantage: In some areas the knife cuts not so deep into the silage like the waved knife.
The knifes are screwed. They can be changed from the waved to the edged, because they are using the same holes in the cutting shield. The waved knifes are wider than the edged knifes.
The knifes are extremly hardened and have a very high life time.
IMPORTANT: If you want to sharpen the knifes (if really needed). Please you a file and make it by hand or VERY carefully with an electric roughing. By heating the surface, the hardening will be destroyed and you have tho sharpen the knife every day.