You're looking for some real powerful chipper/shredders to get rid of all the loads of leafs and twigs in Autumn? Then these two models are the right choice for you. The MTD 450 and 475 don't make any compromise. Feed the large hopper chute with all small and light but voluminous material. The chipper chute swallows thicker branches of up to 5 cm on model 450 and up to 7,5 cm on model 475 thanks to their powerful Briggs & Stratton petrol engines and sharp hardened chipper blades.