International Knife and Saw's Reputation For Steel Mill Knife Performance Is Unprecedented. Advanced technology provides superior wearability and minimizes edge failure for every type of mill operating equipment. Slitter knives are manufactured from the finest alloy tool steels and are precisely heat treated to a uniform hardness for optimum performance. International Knife and Saw manufactures the world's widest range slitter knife sizes plus a full complement of slitter spacers, overarm separator discs and spacers, and rubber and steel stripper rings. Additionally, shear blades in various material grades meet the application requirements of any shearing operations. They are available for all types, sizes and makes of metalworking shears. Save 2007setup software provides high quality slit edges to the closest tolerances.