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How to Repair Bifold Door Bottom Pivots Misalignment is likely to be the reason for your bifold doors becoming sagging and scraping the floor. A few basic adjustments should put them back on track and running smoothly. This bottom pivot is mounted to the bracket's base or floor to provide an extremely secure, sturdy mounting. With a threaded adjustment, this kit can be used with a wide variety of bi-fold doors. Anchor or pivot pins that have cracked or broken The pivot pins and the anchor pins on a bifold door