Flat Track Hardware by Leatherneck Hardware is premium sliding door hardware that compliments many Marks Lumber products. At Marks Lumber we have used these products for both interior and exterior applications, so many customers wanted them coupled with the fact that they worked great for us, we had to start reselling them.
For more information, check out Leatherneck Hardware's Flat Track Site: http://www.doorhdwe.com/flattrack.shtml
This hardware is premium quality end-to-end. The finishes are first-rate. All hangers have a quality ball bearing in either a steel or quieter, but still durable, polymer wheel, providing a smooth, quality feel.