These refiners are also known as “big-bottomed” because they are attached to the rear arms of the tractor with a third point. In principle, its purpose was to extend the mounds left by the unloading of trucks on site since being able to extend forwards and backwards is very fast. Being attached to the arms and its third point means that it can be raised to perform manoeuvres more quickly .
It is also used to remove agricultural field margins, swamp slopes, etc.