These springs are made of patented cold-drawn steel or stainless steel. As it is the case for compression springs, our range of standard tension springs was conceived according to high-precision criteria. All tension springs are cylindrical. The loops have the same diameter as the spring body. They are executed with initial load, i.e. a certain load must be applied before the coils open. Like all other spring types, there is a huge variety of applications for maintenance work or prototype design.