We use the entire range of materials – starting from cold-drawn and patented spring steels and stainless steels up to highest-strength oil-tempered valve spring wires. We offer torsion springs made of hard-drawn spring steel in wire diameters from 1.00 – 9.00 mm. In the spring manufacturing, we process round and profiled wire cross-sections, such as rectangular. We offer most diverse surface treatments, such as zinc flake coating or KTL. Optional multi shot peening enables a substantial increase of the lifetime.