This is a F-tab patio door roller assembly with a 1-1/2 inch concave or grooved steel ball bearing roller. 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. The housing is 3/4 inch wide and 1-1/2 inch tall with a rear adjusting screw. Used by Holleyview, Fullview and a variety of other patio door manufacturers.
This patio door roller is constructed from steel and has a diameter of 1-1/2 in. It comes affixed to an adjustable steel housing assembly. This roller is used on Holly view, Full view and similar styled patio doors.