The PRO 400 Chipper Shredder represents a 20% boost in power from our entry model (the PREMIER 300). That means it can handle branches up to 4” in diameter and can shred bigger yard and garden waste too...up to ¾” in diameter. Plus, with double the number of shredding hammers, this model shreds material more finely—to 1/12 its original volume. | DR Power Equipment