Product review (5 stars): Actually fits Samsung fridge mounts.
I tried a whole bunch of different brands and none of them had the right locking collar.
These did.  I push it into the housing, twist, and it locks in place as expected.

Here are photos showing good filter vs bad filter designs.  Green is good, Red is bad.
If your filter's locking collar matches the green one, then this filter is the right filter.

You can see technical info on Samsung's webpage titled "RFG299AARS/XAA Replacement Filter Does Not Fit".