This pocket door track kit is used with both by-pass and pocket door systems by many manufacturers. With the installation instructions and a few simple tools, this kit is easy to install and it includes all of the fasteners necessary for its complete installation. The two, 4-wheel trolley roller assemblies included with this kit, each feature four 7/8 in. outside diameter plastic wheels with steel ball bearings and together will support doors weighing up to 30 pounds each. The hardware included in this kit includes the following components: one 71 in. track, 1 pair of side adjustable plastic guides, 2 roller assemblies, 1 rubber jamb bumper, 1 wrench tool, installation fasteners and detailed instructions.