Emily from SWISCO responded:
April 4, 2024
Hello! Our 90-278 looks similar. This also measures 2-1/16" on the installation hole centers and has an 11/16" backset. Have a look and see what you think. However, I'm afraid we don't sell a keeper with the specifications shown in your diagram. I am sorry for the inconvenience. Dimensions for 90-278
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