This mirror door roller is constructed from nylon and comes affixed to a steel housing. It features an adjustable bottom mount design with an overall flare width of 11/16 in. This style roller is used on Manufacturers Mirror door and similar style doors. The tab on the back end of the housing allows a screw to hold it in place while the adjusting screw can be accessed through a hole below the installation screw. The 1-1/4 inch concave nylon ball bearing roller allows the metal framed mirrored door to roll smoothly and effortlessly.