Rotor with a specially designed tool, the unique shape of the rotor knives ensure its remains fixed after regrinding cutting interval, do not need to adjust the tool through a complicated process, thereby reducing the disassembly tool downtime. Rotor supported on two bearings,while the width of the rotor shaft according to the largest design, making it possible to shred massive objects. In addition, the ladder shaped rotor blade design allows the cutting tool, thereby increasing the cutting torque, with ladder shaped rotor arranged in V-shaped, so that it can be caught in the shredding room central broken material, this feature prevents the material posted on the wall in shredding room, while greatly increasing the shredding chamber wall in processing of glass fiber reinforced plastic products and when the wear resistance.