Combination set of the top pivot and top guide typically used on several wood bi-fold doors. They are both spring loaded steel shafts set a in 7/16 inch diameter steel housing. The 7/8 inch horizontal roller on the guide provides a smooth guiding of the lead door. The top pivot has a 1/4 inch diameter pin set in its steel housing. To install, lightly tap them into the pre-drilled top mount holes. Used by many bi-fold door manufacturers.