Profile: Duer/Carolina Coil, Inc. manufactures and delivers hot wound springs. We are an ISO 9001:2000 certified company. Our products include cold wound springs, compression springs and hot wound springs. Our products are available in compression, extension, torsion, pigtail, coned, variable pitch and special configurations. Our products are used in nuclear, high temperature and exotic material applications. We also offer grinding, shotpeening, grit blasting and automated powder coating services.