Zenith Cutter - The Leading Manufacturer of Industrial Knives and Blades Replacement industrial machine knives and blades from Zenith Cutter are essential tools in the paper, corrugated, converting, and recycling industries. Higher-grade steels, state-of-the-art manufactur Thousands of customers, including the top OEMs, rely on industrial knives from Zenith Cutter for demanding manufacturing processes…either to MAKE finished goods or to BREAK down materials for recycling. For these MAKE or BREAK applications, Zenith manufactures the best knives in the world with the highest level of quality and dependability.