Well suited to long extensions with no load build up. The spring is usually mounted with the ID tightly wrapped on a drum and the free end attached to a loading force such as a counterbalance. Load capacity can be multiplied by using two or more strips in tandem, back to back or laminated. In use, be sure to leave at least 1-1/2" coiled on the drum at full extension. The spring ID will wrap tightly on the drum so that most applications require no fastening to the drum. Made from Type 301 stainless steel.