The bio-shredder type Bio 100 comes in both petrol or 380 Volts electric engine versions. The grinding system consists of two parts: the first one, named chipper, is used to cut wooden or fibrous materials, just as wood, linden tree, and willow; the second one, by means of little hammers, triturates products like leaves, hedges, and kitchen waste. A good operation is granted even if pebbles or nails have been introduced accidentally. The fineness of the ground material can be adjusted, by way of a mobile sieve. The natural transformation of the biologic triturated material originates a high-protein organic substance, which can be used as fertiliser.