Tension spring posts are spring posts used to fasten tension springs. They function as supports that fasten both ends of a tension spring to stabilize vibrations in it. Posts are available in the standard cylindrical type that attaches the tension spring to a hole in the post, and a hexagonal cylindrical type that attaches the spring to a groove. Various other types can also be selected to match different usage environments. Examples include models attached with a wrench, and roller models that prevent tension spring hooks from scratching. Posts are usually made of stainless steel with a black oxide coating surface treatment. A lineup of sizes is available to support various tension spring and screw sizes, so models should be selected to match the applicable size and usage objective.