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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 the floor. A few simple adjustments will get them back on track. This bottom pivot is mounted to the bracket base or floor for an extremely secure, sturdy mounting. With a threaded adjustment, this kit is compatible with a broad variety of bi-fold doors. Anchor or pivot pins that have broken or cracked The anchor pins and pivot pins on bifold doors