My new door latch plate won't fit the existing hole. Can I enlarge it myself?

First, ensure your new latch is the correct backset and faceplate size for your door. Many doors have standard 1-inch edge boreholes. If it's just the faceplate recess that's too narrow, a sharp wood chisel can carefully widen the mortise. For the bore hole, if it needs enlargement, you'll need a door lock installation kit with the correct size hole saw. This requires precision; guessing wrong can split the door, compromise security, and leave you with a larger repair bill. If you're unsure, a professional handyman or locksmith can ensure the latch fits correctly and securely.