Apparatus and methods of using the apparatus for manufacturing irregularly shaped and sized products, and in particular cheese irregularly shaped and sized crumbles from cheeses, such as semi-soft cheeses including types of cheddar, mozzarella, Monterey jack, Colby, pepper jack, provolone, Swiss, Mexican cheeses and any other combinations of two or more varieties. The apparatus preferably includes five knife assemblies that combine to reduce bulk cheese products into irregularly shaped and sized cheese crumbles in a high-speed commercial manufacturing process. In addition, the apparatus includes one or more augers having flights configured for working or reshaping peripheral edges of the cheese during the manufacturing process.