A broken key stuck in a lock can be frustrating, but with patience and the right tools, you can safely extract it without damaging the cylinder. Here's how to do it:
Tools You'll Need
Tweezers or Needle-Nose Pliers – For gripping exposed key fragments.
Broken Key Extractor Tool – A specialized hook-shaped tool for locksmiths (available online).
Lubricant – Graphite spray, silicone spray, or WD-40.
Thin Wire or Paperclip – To create a DIY extractor.
Super Glue (Cyanoacrylate) – Optional for bonding fragments.
Flashlight – To inspect the keyhole.
Step 1: Stay Calm and Assess the Situation
DO NOT force the key further in or try to turn the lock. This can push debris deeper or damage the pins.
Use a flashlight to check:
How much of the key is visible?
Is the broken edge accessible?
Step 2: Lubricate the Cylinder
Spray a small amount of lubricant (e.g., silicone spray) into the keyhole.
Wait 1–2 minutes to let the lubricant loosen the key and debris.
Gently jiggle the key fragment with your fingers to create movement.
Step 3: Extract the Key Fragment
Method 1: Tweezers or Pliers
If part of the key is sticking out, grip it firmly with tweezers or pliers.
Pull straight out slowly. Avoid twisting, which could snap the key further.
Method 2: DIY Extractor (Paperclip/Wire)
Unfold a paperclip into a straight wire with a tiny hook at the end.
Insert the hook into the top of the keyhole (above the key).
Slide the hook behind the key's teeth and gently pull upward.
Method 3: Broken Key Extractor Tool
Insert the tool's hook into the keyhole alongside the key.
Rotate the tool to catch the key's edge, then pull outward.
Method 4: Super Glue (Last Resort)
Apply a tiny drop of super glue to the broken key's exposed end.
Press a toothpick or thin rod against it and hold for 30 seconds.
Carefully pull the rod to extract the key.
⚠️ Warning: Glue may seep into the lock and damage it. Use sparingly!
Step 4: Test the Lock
After removing the key, insert a spare key to check if the lock operates smoothly.
If the lock feels stiff or won't turn:
Spray more lubricant and work the key gently.
Debris may remain; repeat extraction or consult a locksmith.
Step 5: When to Call a Professional
Contact a locksmith if:
The key fragment is deep inside with no exposed edges.
DIY methods damage the pins or cylinder.
The lock is high-security (e.g., Mul-T-Lock, Abloy) and requires specialized tools.
Preventing Future Key Breaks
Replace Worn Keys: Faded or bent keys are prone to snapping.
Lubricate Regularly: Use dry graphite powder every 6 months.
Avoid Excessive Force: Turn keys gently; never jiggle violently.
Duplicate High-Quality Keys: Avoid thin or poorly cut copies.