No markings, sorry.

A quick learner from Florida, USA says:
October 10, 2022
Hello, I have a broken plastic piece that's supposed to connect two sliding patio doors together. Is this something called a keeper? It was attached to one door with two screws, please see pic with the two holes. Other door pic is where it was supposed to drag the second door along.
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Tom from SWISCO responded:
October 14, 2022

Thanks for reaching out to us. We did sell this keeper at one time, but the manufacturer discontinued it and it is no longer something we can supply. They suggest using our 85-001 as a replacement, instead.
Screen Door Strike
Screen Door Strike
85-001
$0.95
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