This is a combination of a 1-1/4 inch diameter steel concave or grooved ball bearing roller that is 5/16 inch thick with a 1/4 inch axle hole ,and a combination of 5 different axle choices. Depending on the situation, you can choose to rivet the roller into place or use a roll pin, drive pin, binder post and screw or bolt and nut. Regardless of how you need to install the new roller into your existing roller housing, in most cases, one of the five choices will work.
This ball bearing roller is made from steel and comes in a gold zinc plated finish. It includes assorted axles to fit various installations. This style roller fits many different patio door roller assemblies.