PROFI diggers are one of many KFMR Krukowiak offers addressed to the growers focused on production of onion. Those machines are produced in three versions of digging width: 1,2m, 1,5m and 1,8m. Digging element is a roller driven from the PTO; the digging roller works best on light soil, however it guarantees less mechanical damage of onion. PROFI diggers are mounted machines equipped with a kneading shaft and a form. Two-tape construction of the digger allows for precise cleaning and separation of onion from impurities. PROFI diggers are intended for for large growers engaged in industrial production of onion. Due to the weight, the digger must be aggregated with tractors of high power but tere is a possibility of installing a suspension system, so that the digger can be a semi-mounted machine. There is also a possibility of making the PROFI digger with a digging roller. Thanks to introduced constructional changes, PROFI diggers become even more effective and reliable. Among introduced changes it is necessary to distinguish change in the digging element, introduction of the kneading shaft and the form made of plastic.