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How to Repair Bifold Door Bottom Pivots A misalignment could be the cause of your bifold doors becoming sagging and scraping on the floor. A few minor adjustments can bring them back to their proper alignment. This bottom pivot mounts to the floor or base of a bracket to provide a secure, sturdy mounting. Threaded for adjustment, this kit is compatible with a broad selection of bi-fold doors. Anchor or pivot pins that are cracked or broken The pivot pins and anchor pins