Overview
A snapped key is almost always a symptom of a stiff lock that was ignored. The good news: with tweezers, a broken-key extractor or a locksmith's help, the barrel usually doesn't need drilling.
Symptoms
- Half the key is in your hand, half in the lock.
- Door locked or unlocked with the key stuck.
Common causes
- Cylinder was stiff and needed excess force.
- Worn or copied-of-a-copy key.
- Attempted lock snapping (check the cylinder face).
When to call a professional
- Key is flush with or below the cylinder face.
- You can see any sign of tampering.
- You're locked out.
Prevention
- Never force a key - a stiff lock is a warning.
- Replace worn keys before they snap.
- Service the lock annually.