For my glasses they worked. I cannot speak for all glasses though. They were very easy to install, so far have been staying in, and are very comfortable.In the kit there were screws, my glasses had a clamshell like clamp with little posts inside that help the pads in. I did not use any screws, but instead spread open the clamshell like clamp, removed the original, replaced with these and closed the clamp back.
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