SOME WAYS TO GET A BROKEN KEY OUT OF A LOCK

Tweezers
When a key breaks off in the lock, most people go right for the tweezers. Your main concerns should be the thickness of your tweezers and how far the broken key is in the lock. Most tweezers are inappropriately sized for this task and will just end up pushing the key farther into the keyway. Make sure that your tweezers can open wide enough to fit around the key, but not so thick that they cannot fit along the sides of the key.
Due to the warding on most keyways, your average tweezers are not going to fit. Getting a broken key out of a lock with tweezers will work best if there is a bit of the key protruding from the keyhole. When the key is too far back, the chances of you pushing it deeper increase exponentially. We all love the game “Operation”, but sometimes life is more than just a game. Only attempt this method if you are extremely confident in your ability, and your tweezers.
Broken Key Extractor
A broken key extractor tool is the professional solution to this problem. If the locksmith you call does not make their own tools (and chances are they do not), then this will be the tool they use. To use this tool place it inside the keyway along the bitting of the key. To clarify further, you will be trying to hook the teeth on the key with the hook(s) on the extractor. Once placed along the biting, turn and pull, and this should grab and remove the key. Of course, this may take several attempts.
If you are looking to purchase a broken key extractor, I would warn you that much like purchasing lock picks, these tools come in sets that include unnecessary variations. I see some people use a single hooked key extractor, and others use a double hooked key extractor (myself included). Other than that, the other profiles are extraneous. So if you can, save some money and get one or two of these.
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