How to Extract a Broken Key from a Lock: 4 Safe Emergency Methods
Turning your key in the front door lock only to hear a sharp snap that leaves half the key in your hand and the jagged tip lodged deep inside the cylinder is a stressful ordeal. If you don't push the fragment further in, you can usually extract it without replacing the lock.
Golden Rule: NEVER Insert the Broken Half Back In
Your first instinct might be to insert the broken key shank into the keyway to try and turn it. NEVER DO THIS. You will jam the broken fragment past the front security pins, making non-destructive extraction nearly impossible.
Method 1: Lubricate the Cylinder Keyway Thoroughly
Before attempting any mechanical extraction, spray a generous dose of graphite lubricant or silicone spray into the cylinder keyway. Lubricant dramatically reduces friction between the key ridges and internal brass lock pins.
Method 2: The Hot Glue Stick Trick
Best when the key broke flush with the keyhole entrance:
1. Heat the tip of a standard hot glue gun stick with a cigarette lighter until molten.
2. Press the melted glue firmly against the exposed tip of the broken key in the keyhole (be careful not to push glue into the surrounding keyway slot).
3. Hold it completely still for 90 seconds until the glue cools and hardens, then pull straight back smoothly to draw out the key.
Method 3: Coping Saw Blade or Dental Pick
Insert a fine fret saw / coping saw blade (with teeth facing backward toward you) along the side groove of the key. Once past the fragment, angle the teeth to bite into the key brass and gently pull the fragment outward.
When to Call a Professional Locksmith
If the key broke while fully turned (locking the rotor off-center) or the methods above fail, call our 24/7 emergency locksmiths at 936 94 00 23 (+34 936 94 00 23). We use precision micro-extractors and optical scopes to remove the fragment in minutes.
FAQ
Why do keys snap inside locks?
Keys snap due to metal fatigue over years of pocket bending, using the key to yank heavy doors shut, or operating stiff, unlubricated lock cylinders.
How much does a locksmith charge to remove a broken key?
Professional broken key extraction typically ranges between €50 and €90 during standard hours if the internal lock mechanism is undamaged.