This is a patio door keeper.

A contractor from Peoria, Arizona says:
May 30, 2020
My Tenant removed this and I need to replace it. I don't know what brand it is. It's 8 1/4" tall x 1 1/2" wide. Please respond if you know what brand it is or where I can buy one. Thanks.
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Bob from SWISCO responded:
June 3, 2020

We don't have an exact match for this keeper. It looks almost like a double-point version of our 89-029. See our 82-249. Look it over and see if you think you could use this as a replacement. Show us your mortise lock if you're uncertain. 
Sliding Glass Door Multi-Point Keeper
Sliding Glass Door Multi-Point Keeper
82-249
$12.97
Viking Keeper
Viking Keeper
89-029
$4.70
How to maintain a sliding glass door
How to maintain a sliding glass door
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