Headquartered in a state-of-the-art facility on the dynamic I-85 corridor outside of Greenville, SC, Duer/Carolina Coil is positioned to offer the highest quality springs on the market. We operate with a team of the industry’s brightest engineering minds, and we buy from only the most reputable steel suppliers. Our commitment to excellence means we invest continuously in our people, processes and machinery to be more efficient in our plant. It means we never compromise on quality. And it means integrity in our pricing.