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Universal Interior Products

Lock, key, and other universal interior products designed and manufactured by Harper Engineering Co.

Harper Engineering Co. offers a diverse range of products that cater to a wide variety of application, with combined sales quantities in the millions. We classify these versatile products as "Universal" due to their ability to serve multiple purposes across difference industries and sectors. Some examples of our "Universal" products include decorative washers, spring-loaded door snubbers, lock and key combinations, hat clips, etc.