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How to Repair Bifold Door Top Roller Guide If your bifold doors have become stuck, they probably require a little attention. They could need to be cleaned, lubricated or adjusted. The problem could be caused by loose bolts on the top pivot or by the top guide roller. This kit contains all the hardware required to restore your bi-fold closet door to optimal performance. Take the door off Installing an internal set of bifold doors might seem like an involved and difficult project, but it's actually quite eas