Profile: Don Springs (Sheffield) Ltd. specializes in the design and manufacture of springs for all areas of industry including agricultural, automotive valves, bottling plants, gas regulators, horse box, or trailer springs & rail. Our product range includes compression springs, extension springs, torsion springs, clock type springs, and leaf springs. Our services include one-off prototypes, or small production runs in hand manufacturing section, volume production in automatic coiling section, design service, and breakdown service.