the present invention relates generally to cutting blades for shredders . specifically , this invention teaches cutting blades , cutting blade assemblies , and a rotary cutting assembly which reduce the power needed to shred paper , plastic , and other forms of media that hold information . this is accomplished by creating a cutting blade with at least three adjacent teeth . the formation of three or more adjacent teeth more readily tears through paper and other media thus reducing the amount of power necessary to drive a shredder . this invention further discloses light weight cutting blades which require less material to manufacture , thus saving both materials and cost .