Maryland Precision Spring is a full-service manufacturer of coiled springs, constant and variable force springs, stamped and formed metal parts, Reel Retrievers and Slideline? POP products and systems. A well-trained and experienced workforce, tools designed and built in-house for ultimate quality control, and strong customer service surround every premium product Maryland Precision Spring offers. Rolex Spring is a leading designer and manufacturer of precision disc springs. With manufacturing capabilities ranging from 1/4" to 40" (6mm to 1000mm) OD and using materials such as high carbon and stainless steels, Inconel? and beryllium copper, Rolex maintains a stock inventory of over 10,000 disc spring sizes.