Recommended especially to work and improve stony soils in agriculture, greenhouses, parks, gardens and golf courses. A special screening system safely separates and deposits the stones picked up from the soil underneath the seed bed. Fine soil remains on top. 5 models are available following the working width as: 120, 140, 165, 185, 205 cm. 540 rpm gearbox mono-speed, automatic chain stretcher, slip clutch drive, 6 blades per flange (helicoidal), gauge roller, protection steel screen for stones, universal 3 point hitch cat. 1st and 2nd.