Prime-Line D 1846 1 In., Steel, Sliding Door Tandem Roller Assembly with F-Tab (Single Pack)

Used by a variety of sliding patio door manufacturers, When the corner screw passes through the F-tab the assembly is captured by the side stile and bottom rail as the screw draws the two sides together, 1 inch diameter tandem concave rollers, Stamped steel with steel ball bearing, Rear adjustment screw