Open-Coiled/ Helical Shaped Compression Spring is designed to create resistance to a compressive force and used for wire diameter of 0.1 - 60mm. The Compression Spring is available with ground ends to increase operational life and allow the spring to sit squarely on the load-bearing surface. Compression Spring is offered in open-coiled and helical type construction. Open-Coiled/ Helical Shaped Compression Spring is usually coiled with a constant diameter, though it can be produced in hourglass, cone and barrel shapes.