This lock is used in conjunction with 6-1473xxx used with a tie bar as a 'slave' lock because you move one lock and this one moves with it.
Tie bars are NOT available as they are provided by window manufacturers and not by Truth Hardware.
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Truth Locking handle not working properly? If the handle won't click into position and falls down, your pin is probably broken.
Replace the nylon pin in your locking handle instead of replacing the entire unit.
Slides in from the side with a little help from the tip of a screwdriver. The old one can be removed the same way.