A broken key in a lock is one of those problems that seems minor until it happens to you. One moment you're unlocking your front door, the next the key snaps off inside the cylinder, and you're standing there holding the bow end with nothing to grip. It's frustrating, but it's also a situation where the wrong move in the first few minutes makes the job significantly harder and more expensive.



This guide covers what to do immediately after a key breaks in your lock, what not to do, and when you need a locksmith to take over.

Why Keys Break in Locks

Keys don't usually break without warning, though the warning is easy to miss. A key that has become difficult to turn, requires more force than usual, or feels slightly different when operating the lock is showing signs of wear. Keys are cut from relatively soft metal, and repeated use causes metal fatigue over time, particularly at the point where the blade meets the bow.

Other contributing factors include a lock that is worn or misaligned, forcing a key that isn't quite right for the lock, or using a key that was cut inaccurately to begin with. Cold weather can also make locks stiffer, which means more force is applied, and breakage becomes more likely.

If a key has broken in your lock, there's a reasonable chance the lock itself played a role. That's worth keeping in mind once the immediate problem is resolved.

What to Do Immediately After a Key Breaks

Stop turning and stop pushing

The instinct is to keep trying to operate the lock, but any further rotation or pressure drives the broken piece deeper into the cylinder. The deeper the fragment sits, the harder it is to extract. As soon as the key breaks, release all pressure and leave the lock exactly as it is.

Check how much of the key is visible

Look at the keyway and assess whether any part of the broken blade is protruding from the cylinder face. If a few millimetres are visible and accessible, there are some extraction options worth attempting carefully. If the key has broken flush with or inside the cylinder, this is a job for a locksmith.

Check whether the lock is in the open or locked position

If the broken fragment happens to leave the lock in the unlocked position, you can still get inside while you arrange a locksmith visit. If the lock is in the locked position with the key fragment inside, you cannot operate the lock until the fragment is removed.

What You Can Try Carefully

If part of the broken key is still protruding from the cylinder, there are a couple of methods worth attempting before calling a locksmith. The emphasis is on being careful. Aggressive attempts at extraction are one of the most common reasons a repairable situation becomes a lock replacement.

Needle-nose pliers

If enough of the key blade is protruding to grip, very fine needle-nose pliers can sometimes extract the fragment by gripping it and pulling straight out, in line with the keyway. Do not twist or lever sideways. If you can't get a clean grip without the pliers touching the cylinder face, stop.

A broken key extractor tool

These are inexpensive tools available at hardware stores and are designed specifically for this task. They hook into the serrations on the key blade and allow the fragment to be pulled or worked out of the cylinder. They're worth having if you want to attempt extraction yourself, but they do require some feel for the lock.

Lubrication first

Before attempting any extraction, applying a small amount of graphite-based lock lubricant or WD-40 to the keyway can help the fragment move more freely. Avoid oil-based lubricants as a long-term solution, as they attract dirt and cause cylinder problems over time, but in this situation, getting the fragment out is the priority.

What Not to Do

These approaches cause more damage than the original problem and come up repeatedly when locksmiths are called to broken key jobs.

Do not use a screwdriver to try to turn the lock

If any part of the key is still engaged with the cylinder pins, forcing rotation with a screwdriver drives the fragment further in and can damage the pins.

Do not use super glue or adhesives

The idea of gluing something to the broken fragment and pulling it out sounds logical. In practice, the adhesive gets into the cylinder mechanism and creates a much more involved repair job.

Do not use a bobby pin or paper clip to dig at the fragment

Without the right tool profile, these implements push the key fragment further into the cylinder rather than hooking it out. They also risk damaging the keyway.

Do not force anything sideways

Key extraction works by pulling straight back along the axis of the keyway. Any lateral pressure bends the fragment, making extraction harder, and can score the inside of the cylinder.

When to Call a Locksmith

If the key has broken flush with the cylinder face, if your careful extraction attempts haven't worked after a couple of tries, or if you're not confident in what you're doing, call a locksmith. Continuing past that point typically turns a straightforward extraction into a cylinder replacement.

A licensed locksmith has purpose-built extraction tools and the technique to use them correctly. In most cases, a broken key can be removed from a residential lock without any damage to the cylinder. True Locksmith carries extraction tools and attends broken keys and keys stuck in lock jobs across Melbourne's Bayside and Southeast suburbs as part of our lock repair service.

Once the fragment is out, the locksmith will also assess the condition of the lock itself. If the lock contributed to the break, operating it with a new key without addressing the underlying issue means the problem is likely to repeat.

Will the Lock Need to Be Replaced?

Not necessarily. If the cylinder is in good condition and the extraction was clean, a new key cut to the original profile is often all that's needed. True Locksmith provides key-cutting services and can cut a replacement on the same visit in most cases.

If the cylinder is worn, the lock was already difficult to operate before the key broke, or the extraction caused damage to the internal pins, a cylinder repair or full lock replacement may be the more practical outcome. A locksmith will assess this honestly on inspection rather than defaulting to replacement as the first recommendation.

After the Broken Key Is Out: What to Check

Once the immediate problem is resolved, it's worth looking at a few related things before considering the job done.

Get a spare key cut

A broken key situation often reveals that a household has been operating on a single key with no backup. Having a spare with a trusted neighbour or family member means a broken key becomes an inconvenience rather than a lockout. True Locksmith can cut spares on the same visit.

Check your other keys

If one key has broken due to metal fatigue, other keys on the same ring that are the same age may be in a similar condition. Look for any keys that feel slightly flexible or show visible wear at the shoulder, where the blade meets the bow.

Assess the lock

If the lock has been stiff, inconsistent, or difficult to operate, have a locksmith look at it. A lock that is developing mechanical problems doesn't get better with continued use. Addressing it before it fails entirely costs less than an emergency callout later.

Broken Key or Key Stuck in Lock Across Melbourne's Bayside Suburbs

True Locksmith handles broken key extraction and lock repair jobs across Bayside and Southeast Melbourne. Our locksmiths arrive with the tools to extract most broken keys without damaging the cylinder, assess the lock condition, and cut a replacement key on the spot where needed.

We serve homeowners and tenants across Brighton, Hampton, Sandringham, Cheltenham, Moorabbin, Bentleigh, Beaumaris, Elwood, Heatherton, Highett, Parkdale, Mordialloc, McKinnon, Mentone, and surrounding suburbs.

If you have a broken key in your lock or a key stuck in a lock in Melbourne, call 0421-767-767 to speak directly with a licensed locksmith. For more on our repair services, visit our Fix Locks page.