How to enlarge lock hole (small mailbox)?

by Amir   Last Updated September 17, 2018 05:21 AM

The hole before I messed it up a bit


Had to break my apartment mailbox lock open after the key broke. Been looking and no where seems to have a lock that small. How can I enlarge the current hole?

I am far from a hands on guy, thought I can chip the sides off by moving the drill bit around, but got no where after going at it for half an hour

Please let me know how this is often done and what I need to do it.

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