This replacement roller is for sliding glass patio doors and features a metal housing with two steel concave ball-bearing wheels. Used on Acorn Dorwal 1100 Series and 1200 Series doors
This part does not include new fasteners. Do not throw away your original screws, you will need them for the installation of your new part.
The typical patio sliding glass door uses two roller assemblies, one on each bottom corner of the sliding door. We recommend replacing both sliding door rollers at the same time to prevent extra wear-and-tear to one new roller, which will have to work twice as hard when paired with an old roller.