Some of the shredders include: Ball & Jewell, Cumberland, Jacobson, Reduction Technologies, Scott, Shredding Systems Inc., Weil, more. Shredders, sometimes referred to as "grinders, granulators", which are different types of machines, these machines also break up/reduce plastic, wood, paper, rubber and other waste/scrap, but use different ways. These machines utilize horizontal, (two) rotors with notches, or other to shred up plastic, tires, wood, glass, etc into manageable sizes - equipment does not pulverize the rubber or whatever is thrown in to the machine. These shredders are used for an initial/primary size reduction stage, breaking up plastic scrap, or whatever gets thrown in there, after that this reduced scrap can be put into a different shredding/grinding/granulating or pulverizing system for further size reduction. Some of the shredders available include; Holtzmag, Linder, Weima. Single shaft is only one of a few different types of shredding systems, one example of another type is "single shaft/one shaft". All equipment may not be listed on this website, you should contact Davey Industries to see what is for sale.