The 200PD is commercial-grade hardware ideally suited for heavy door applications where smooth, trouble-free operation and long life is a necessity. The 200PD is primarily designed for on-site pocket door fabrication but can be adapted for use in other various configurations and applications. The heavy-duty extruded aluminum I-beam track is made to precise specifications and zinc-plated ball bearing wheel hangers are manufactured with Johnson's assurance in mind. Heavy-gauge steel components are zinc-plated for a quality appearance.