Snapped a key in the lock? Here's what to do next
Your key has broken off in the door lock. What you can safely try to get it out, when to stop, and whether the lock needs replacing afterwards.
You turned the key, there was a bit more resistance than usual, and then no resistance at all. Half the key is in your hand. The other half is in the door. It's a horrible little moment, and it's nearly always the lock's fault, not yours — a key that snaps was almost always fighting a lock that had gone stiff.
The gist
If a decent stub is sticking out, you can try to grip it with fine pliers and pull it straight out, no wiggling. If the break is flush with the lock or sunk inside it, stop there — anything you poke in after it makes the job bigger. A locksmith can normally extract the broken piece and, if the lock was sound before, leave it working with a fresh key cut from your half. Don't keep trying to lock the door with half a key in it.
Why keys snap
Keys are brass or nickel silver — soft metals, chosen so the lock wears the key rather than the other way round. They snap when:
- The lock is stiff and you apply more and more turning force until the thinnest part of the key gives way. This is the big one.
- The key is worn. Years of use thin it out, especially at the shoulder near the bow. A key that's visibly bent is on borrowed time.
- It's a copy of a copy. Each generation loses a little accuracy and a little metal.
- You use it as a door handle — pulling the door shut by the key levers it sideways against the cylinder.
Cold weather is the usual trigger. The lock contracts and stiffens, you push harder, and the key loses.
Getting the broken piece out
Only worth trying if a real length is proud of the lock face:
- Don't turn anything. If the lock is mid-turn, gently return it to the position where the key would normally come out — usually straight up or straight across.
- Grip the very end with needle-nose pliers or a pair of tweezers that can get a proper bite.
- Pull straight out, in line with the keyway. No rocking, no wiggling. If it doesn't move with steady pressure, stop.
- A blob of superglue on the stub, pressed to the broken half and held for a minute, sometimes lets you draw it out as one piece. Keep glue off the lock face.
If the break is level with the lock or below it, put the pliers down. From here it's a specialist tool job, and the wrong poke drives the piece deeper.
When to leave it to a locksmith
- The broken end is flush or recessed.
- The piece won't come with a straight, steady pull.
- The lock is stuck mid-turn and won't return.
- It's a uPVC or composite door — the cylinder is often the underlying problem.
- The door is locked shut with the stub inside and you're on the wrong side.
A locksmith uses key-extractor picks — thin hooked tools that catch the key's cuts and walk it out — and it's usually a quick job. If you're anywhere in Bedfordshire, that's routine work.
Does the lock need replacing?
Not automatically. If the lock turned fine until the key snapped, extraction plus a freshly cut key from your remaining half usually puts you back to normal. You'd change the lock if:
- The snap damaged the pins or the cam inside.
- The lock was already stiff or sticking — the snap was the symptom, not the cause.
- It's a plain euro cylinder on an exposed door and you'd rather move up to an anti-snap one while it's apart.
A good locksmith will tell you honestly which of those applies rather than defaulting to a new lock.
Stopping it happening again
- Lubricate the lock twice a year with a PTFE or graphite spray, not oil.
- Bin bent or worn keys and cut fresh ones from the best original you have.
- Never pull the door shut by the key. Use the handle or the door itself.
- Fix a stiff lock when it starts, not when it strands you. See key won't turn in the door.
Snapped a key and the piece won't come out? Call 07362 773424 and we'll sort it.
Frequently asked
- Can a locksmith get a broken key out without replacing the lock?
- Usually, yes. With key-extractor tools the broken piece can normally be drawn out and, if the lock was sound before it snapped, it carries on working. A new key is cut from the half you're still holding. Replacement is only needed if the break damaged the lock or it was already on its way out.
- Is it safe to try to pull a snapped key out myself?
- Only if a good length is still sticking out and you can grip it with fine pliers and pull straight, with no wiggling. If the break is flush with the lock face or below it, stop — pushing it in further or scratching the pins turns a simple extraction into a lock replacement.
- My key snapped because it was worn — will a new copy snap too?
- It can. A worn original passes its thin spots on to every copy cut from it. If a key has been getting bent or floppy, have a fresh one cut from a better original or, if the lock itself is stiff, get that looked at rather than forcing thinner and thinner keys through it.
- The key snapped in a uPVC door — is that different?
- The extraction is much the same, but a snapped key in a uPVC euro cylinder often means the cylinder was already stiff or failing. It's common to extract the key and change the cylinder in the same visit so it doesn't strand you again.
- Can I still lock the door with half a key in it?
- Don't rely on it. Even if it seems to catch, the broken section can shift and jam the lock solid — potentially with the door locked and you outside. Get the piece out before you trust the door again.
- How do I avoid snapping a key?
- Don't use the key as a handle to pull the door shut, lubricate the lock twice a year, replace bent or worn keys early, and sort a stiff lock instead of forcing it. Most snapped keys are a stiff lock that finally won.
Locked out, or a lock playing up?
Call Gabriel direct. Send a photo of the lock and you will get the likely price on the phone before anyone drives out. No call centre, any hour.