Depth of this keeper/strike plate

A home owner from Colorado says:
I need to have another one of these (see photo) for my 2nd sliding patio door handle to latch into with the double hooks that come out.

Is this the right one? how deep is it? Mine is 5/16 ?

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Casey from SWISCO responded:


I can't tell based on your photos what the correct replacement keeper would be but if you can show us a photo of your mortise lock, that should give us a better idea of what the correct part would be. Thank you!

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