How to Get a Broken Key Out of a Lock — Step by Step

Quick answer: if a piece of the key is sticking out, you can often pull it free yourself with fine pliers or tweezers. If it's snapped flush with the cylinder, stop — trying to dig it out usually pushes it deeper and turns a five-minute job into a lock change.

Quick answer

• Key sticking out? Grip and pull straight, don't wiggle or turn it
• Key flush with the lock face? Stop trying — call rather than dig
• Never force the broken end to turn the mechanism, even if it "almost" catches
• Superglue-on-a-matchstick tricks work sometimes, but only on protruding pieces, and only if you're gentle
• Lock change prices if it comes to that

Why keys snap in locks in the first place

Three usual suspects: metal fatigue after years of the same twist, a lock that's slightly worn or misaligned so you've been forcing the key harder than you realise, or a key that was cut from a copy of a copy and never quite fit right. Old brass keys are especially prone to it — softer metal, more flex, more fatigue over time.

(John's note: the second most common cause, after fatigue, is someone using the key as a makeshift screwdriver, paint-tin opener, or package-tape cutter for a few years first. The key remembers.)

Step-by-step: getting a broken key out without a locksmith

If a piece is protruding from the lock:

1. Don't turn it, wiggle it, or push it back in "to see". Grip it straight on with fine-nose pliers or tweezers.
2. Pull directly outward, in the same line the key would normally slide. Any sideways pressure risks snapping it again or scratching the pins.
3. Once it's clear, test the lock gently with your spare key before assuming everything's fine.

A few tricks that sometimes work on a protruding piece (no guarantees, and none of them work on a flush break):

• A thin strip of superglue on the tip of a matchstick, pressed to the broken end and left to set for a few seconds, can sometimes bond enough to pull the piece out. Use sparingly — too much glue in the mechanism creates a new problem.
• A coping saw blade or thin hacksaw blade, teeth facing outward, gently worked past the broken piece and turned to catch it, can sometimes drag it clear.
• Two thin flat-blade screwdrivers either side of the key, used like chopsticks, occasionally get enough grip to walk it out.

(A note on YouTube tutorials: the ones filmed in perfect lighting with a lock held in a vice on a workbench are not the same lock currently defeating you at 6pm in the rain. Adjust your expectations accordingly.)

If the piece is flush with the lock face: stop here. There's nothing left to grip, and every DIY method that works on a protruding key relies on having something to hold. Trying anyway is the single most common way a snapped key turns into a replaced cylinder.

When to stop and call a locksmith

• The key is flush or below the surface of the lock — nothing to grip
• You've tried once, gently, and it hasn't moved — repeated attempts risk pushing it deeper or damaging the pins
• It's your only key and you're locked out as well as dealing with the break
• The lock feels different after the break — stiffer, or not quite catching — even after the piece is out

Extraction with the right tools takes minutes for someone who does it regularly. It's one of the more satisfying calls, honestly — a five-minute fix that feels like a huge relief to whoever's been standing at the door for twenty minutes with tweezers.

What happens after the key's out — do you need a new lock?

If the extraction was clean and the lock still turns smoothly, no — you just need a replacement key cut, ideally from the original rather than a copy of a copy (that's often how you got here in the first place). If the cylinder was damaged during the original break or a forceful extraction attempt, a straightforward cylinder swap is £61 for labour. If the mechanism itself needs work rather than just the cylinder, that's £74–£124 depending on what's actually gone wrong.

Sign-off

If you've got tweezers out and it's not budging, put them down and call 020 3780 8827. John will tell you honestly whether it's a two-minute extraction or a lock change, before he's even driven over.