It is a machine with a small footprint, fast and applicable to excavators weighing less than 25 pounds. Delete effectively and in a short time weeds thanks to a cut performed by 24 nylon threads (upgradeable to 42) fixed to a head actuated by a hydraulic motor. The model RIS1 has a cutting diameter of 48cm while the model RIS2 has a cutting diameter greater than and equal to 62cm.