These coil springs are used to mount recessed trims to recessed housings. Use one pair per trim and housing. Attach one spring coil by the hook to the trim, and hook the other end to the clip inside the housing, or to the mounting plate or bracket. If your housing does not have a place to hook the spring onto, you can utilize universal mounting clips, which slip onto the edge of the housing and provide a mounting mechanism for installing trims with the coil springs.