Key has broken off inside the lock

Symptoms

• Part of the key snapped off while turning or removing it
• Broken piece is visible in the keyhole
• Lock may be stuck in a partially turned position

Likely causes

• CommonWorn or weak key snapping under torqueOld, thin, or already-bent keys are more prone to breaking.
• CommonExcessive force used on a stuck or frozen lockForcing a key that's stuck or frozen is one of the most common ways it breaks.
• PossibleCheap or poorly cut key materialSome replacement keys are made of softer metal prone to snapping.

What to do

1. Stop turning or forcing anything further to avoid pushing the broken piece deeper.
2. If part of the key protrudes, try gripping it with fine-tipped needle-nose pliers or tweezers and pulling straight out.
3. If the piece is flush or recessed, a broken key extractor tool (a thin barbed tool) can often hook and remove it.
4. Apply a small amount of lubricant around the broken piece before attempting removal to reduce friction.
5. Avoid using superglue or other adhesives to try to pull the piece out, since this can permanently damage the lock.
6. If extraction isn't successful, a locksmith can remove the broken piece and cut you a new key, often without replacing the whole lock.

Tools and parts

• Needle-nose pliers or tweezers
• Broken key extractor tool
• Lubricant

When to call a pro

Call a locksmith if you can't extract the broken piece yourself, or if you're locked out because of it.

Safety