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The RV Designer T500 is a built-in deadbolt that eliminates the need to add a separate residential-style deadbolt to your trailer door. Once extended, the bolt locks fully into place for true deadbolt security, not just a spring latch.
It's designed as a replacement for the TriMark 60-251, so it's a common swap for owners dealing with a worn or broken factory lock.
Check your door thickness and existing opening dimensions against the specs above before ordering to confirm fit.