Accurately drill panels when installing quick turn fastener springs. Start with a 1/4" center hole and use the fixture to locate and drill 1/8" holes for mounting the springs. Size listed is spring center to center distance. The key to success in a car building project is access to high quality, reasonably priced parts that get the job done right. Each All-star part is the result of our dedication to research and development. Once a need is established, parts are designed and manufactured by talented craftsmen, many of whom are racers and hot rodders themselves. Many All-star Performance parts are one-of-a-kind; you wont find them anywhere else.