Pepetools engineered a unique housing that maximizes durability and increases strength, all while decreasing overall mass. Thanks to a new generation of precision machining, Pepetools "ULTRA" Series rolling mills are stronger than ever. Standard on each mill is a high performance 4:1 reduction gear box, turned with a high strength forged steel handle. Each roll is precision machined from select grades of high density steel. After the machining process is completed, each roll is hardened to 65 HRC in strategic locations utilizing the latest in induction heat treating methods.