L.E. Johnson Products' 1700 Series Folding Door Hardware Kits come with positive pivot locks that permanently hold the top pivots securely to the overhead track. Once the doors are in place, they can't fall out. They are surface-mounted, so there is no drilling to insert door pivots and guides into the doors. The adjustable door brackets mount on the jamb, not the floor, so carpet can be run into closets without cutting.