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How to Repair Bifold Door Bottom Pivots A misalignment could be the reason for your bifold doors becoming sagging and scraping on the floor. A few minor adjustments can get them back on track. The bottom pivot is attached to the floor or the base of a bracket for a sturdy, secure mounting. It is threaded to allow for adjustment. kit is compatible with a broad selection of bi-fold doors. Cracked or Broken Anchor or Pivot Pins Anchor pins and pivots may be damaged or misaligned on a bifolding door,