This repair kit contains enough parts to repair most two door sets. This kit will easily repair a 3/8 In. diameter hole system. It is best used on track systems with a width of 7/8 In. It includes enough parts to repair 1 set of bi-fold doors. It has 1 floor and jamb mounted pivot bracket, top and bottom pivots, 1 7/8 inch diameter roller guide, snugger, aligners and fasteners for a quick and easy installation.