Seven-sections lock for 15 mt. model.
Nine-section lock for 21 mt. model.
Every section is independent during opening and closing operations thanks to a range of pistons, active for any single section.
Reduced overall dimension when the boom is closed.
Easy in transport even though it is about 15 mt. or 21 mt.
Possibility to chose the section to weed.

Optional : two hydraulic pistons, one to set the slopes, one to raise the boom enough to regulate the distance between nozzles and land