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How to Repair Bifold Door Bottom Pivots The misalignment of your doors could be the cause of your bifold doors sagging and scraping on the floor. A few minor adjustments can bring them back in line. The bottom pivot is attached to the bracket's base or floor to provide a sturdy, secure mounting. With a threaded adjustment, this kit can be used with a wide selection of bi-fold doors. Anchor or pivot pins that are cracked or broken The pivot pins and anchor pins on bifold door