Since 1896, Duer/Carolina Coil, Inc. has been manufacturing coil springs and is committed to exceptional customer service, hi ... gh product quality, and continuous technical advancement. Our Team of Engaged and Dedicated Employees makes us the preferred coil spring supplier worldwide. Our Mission is to fully develop and utilize our collective talents to manufacture engineered springs for partner companies that meet or exceed their quality, delivery and service expectations, while allowing us to maintain long-term stability and generate growth. We have strong values of integrity, continuous improvement, teamwork and personal responsibility, and we maintain a family atmosphere. We are committed to capital investment as a means of ensuring we remain at the forefront of the spring industry. We offer Hot Wound and Cold Wound springs manufactured from .250” (6.35mm) wire diameter to 3.125” (80mm) bar diameter in the following configurations - Compression, Extension, Torsion, Pigtail, Conical, Variable Pitch and more. read more