L.E. Johnson Hardware 100FD362 100FD Aluminum Bi-fold Hardware Kit Smooth operation is assured by machine turned hanger wheels running on extruded, convex rails Machine turned, balanced wheels riding on permanently lubricated ball bearings give effortless travel to doors Precision extruded aluminum track provides smooth rails for travel One point wheel/track contact virtually eliminates any dirt accumulation hindering Holds wheels securely inside hangers cannot fall out yet can be disengaged from door plates with a flip of a clip Hardware Included: Yes Product Type: Bi-fold Hardware Kit Sub Brand: 100FD Commercial or Residential: Commercial and Residential Screws Included: Yes Brand Name: Johnson Hardware Material: Aluminum Maximum Panel Width: 18 in Mounting: Top