Door knob and lock

A quick learner from Elkridge, Maryland says:
We are fixing a door that was banged up and need to replace the lock and door that I've sent.
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Tom from SWISCO responded:

I'm not sure what size you need, but look at our 40-123 and 40-129 to start out. Carefully go over the dimensions we show on each product's respective store page to see if you could use either as a replacement.

A quick learner from Elkridge, Maryland says:
If I buy both replacements and try to return the one that doesn't fit is that ok ?
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Tom from SWISCO responded:

That's perfectly fine. You can see our return policy here

40-123 : Key Cylinder with Thumbturn, Kwickset
Key Cylinder with Thumbturn, Kwickset
40-123
$32.80
VIEW >
40-129 : Offset Key Cylinder with Thumbturn
Offset Key Cylinder with Thumbturn
40-129
$39.28
VIEW >
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