This new Rock Crusher from K&M Krushers. These crushers are the next generation of crushers. All of the critical parts are cut out with a CNC Laser cutter to insure everything is square and precise. The bolts & nuts that hold the hammers and mount your motors are schedule # 8 alloy. Your new K&M Krusher features a 14" Drum with a 3" Infeed Tube.