Published 2026-04-29 · Lone Star Lock Co
Broken Key Stuck in Lock? Houston Extraction Guide
Quick answer: Broken key extraction in Houston usually runs $75 to $200 standard hours, including a fresh key cut. Don't try to push or pry the fragment yourself. The wrong move turns a $100 extraction into a $250 cylinder replacement. Dispatch reaches Inner Loop addresses in 20 to 35 minutes. Mortise locks on older Heights and Montrose homes take a bit longer.
Why keys break
Keys break for predictable reasons. Metal fatigue. The brass alloy weakens at the thinnest point. Usually right where the blade meets the shoulder, which is the highest stress point during normal use. Over years of pocket carry, the metal fatigues. Eventually a small tug on the keyring or a hard turn against a stiff cylinder is enough to snap the blade. Houston humidity accelerates this by corroding the brass surface and reducing the alloy's effective strength over time.
The other path to a broken key is a stuck cylinder. A pin that's gummed with corrosion or debris grabs the key harder than the lock should. The user applies more force trying to turn it. Eventually the key shears. Houston flood events leave water inside lock cylinders, and the post-flood corrosion creates exactly this scenario. We see a noticeable spike in broken-key calls for several weeks after major flood events.
How extraction actually works
The right tool for the job is a hooked extraction pick. Thin. Flexible. Spring steel with a small hook on the end. The pick goes into the keyway alongside the broken fragment, the hook engages the fragment's serration or end, and a steady pull walks the fragment out. The cylinder pins lift normally during the pull (because the broken half of the key is still doing its job lifting them), so the fragment slides out the same way it went in originally.
The wrong way to do it is to push the fragment deeper, try to grab it with tweezers or pliers (the fragment is too short and the keyway is too narrow), or drill the cylinder. Drilling is a last resort that destroys the cylinder. Almost every Houston extraction call is solvable with the hooked-pick approach in under 5 minutes once the tech is positioned correctly.
What to do (and not do) while you wait
- Do not push the fragment further in. The deeper it goes, the harder the extraction. Sometimes a deep-pushed fragment ends up jamming a pin, which moves the job from extraction to cylinder replacement.
- Do not try to use the broken half as a key. Even if it seems to fit, the missing blade portion means it can't lift all the pins. You'll wear out the cylinder trying.
- Do not spray WD-40 or oil into the cylinder. Counterintuitive, but WD-40 attracts dust and gums up pins over time. If the lock is sticky, the correct lubricant is graphite powder or a dry-film PTFE spray.
- Do save the broken half. If the broken half is intact, we can use it to cut a replacement key on-site. Saves you a trip later.
- Do tell the dispatcher whether it's a door lock or an ignition. Different tool kits, different pricing.
House door extraction
Standard residential cylinder extraction is usually fast and damage-free. The tech inspects the cylinder, selects the right hook profile, and pulls the fragment in under 5 minutes. Fast. We cut a fresh key on-site from the broken half. If the broken half is too damaged to copy, we decode the cylinder by reading the pin positions and cut from the decoded combination. Either way, the customer leaves with a working key in hand.
Houston-specific notes. Older mortise locks (1920s and 1930s Heights, Montrose, and parts of the Museum District) take a bit longer because the keyway opens into a lever pack rather than a pin stack, the extraction angle is different, and the cylinder usually has to come out of the mortise body partway through the pull to give the tech enough working room with the hooked pick at the correct angle. Newer Schlage and Kwikset cylinders (most post-1980 Houston-metro construction) are straightforward. Smart-lock cylinder backups (Schlage Encode, Yale Assure, August Wi-Fi Smart Lock) extract the same way as standard pin-tumbler hardware because the backup cylinder is a standard pin-tumbler under the smart housing.
Car ignition extraction
Keys break in car ignitions usually at the plastic-to-metal joint. The transponder head stays in your hand, the blade stays in the ignition. Extraction is similar to a door lock: hooked pick, steady pull, fragment comes out. The complication is that we have to cut and program a replacement transponder key while we're there, because you need a working key to drive the car away.
Total time on-site: 30 to 60 minutes for most makes. Total cost: $150 to $400 depending on whether the car uses a basic transponder or a smart proximity fob. If the ignition cylinder is damaged from the break, replacement is the next step at $250 to $600. Most Houston ignition extractions don't damage the cylinder, but a key that broke because a pin was already stuck inside (rather than because the key itself fatigued) is more likely to have collateral damage.
When extraction becomes replacement
A few situations push the job past extraction:
- A pin shears inside the cylinder. Usually because someone tried to force the key after the break. The cylinder is no longer recoverable, and replacement is the next step.
- The cylinder body itself is damaged. A bent keyway, cracked shell, or stripped tailpiece means replacement.
- The cylinder is corroded internally. Common post-flood. Even if we extract the fragment, the cylinder won't work reliably going forward. Replace.
- The lock is a high-security cylinder with a sheared sidebar. Medeco and Mul-T-Lock cylinders have a sidebar that can shear from forced turning. Replacement of that specific cylinder is the fix.
Replacement cost varies by hardware brand. Standard Schlage or Kwikset replacement: $150 to $300 installed. High-security replacement: $300 to $600. We carry standard residential replacement cylinders on the truck. High-security cylinders sometimes need a follow-up trip to source through our wholesale supplier.
Frequently asked
How much does broken key extraction cost in Houston?
Standard hours: $75 to $200 on-site, including a fresh key cut if the broken half is intact enough to copy. After-hours: $150 to $250. If the cylinder itself is damaged from a forced attempt or stuck pin, the cost climbs because cylinder replacement is the next step. We quote the range on dispatch once you describe what happened.
Can I just push the broken key in further?
No. Don't push, don't pry, don't try to dig it out with a paperclip or a piece of metal. You will jam the fragment deeper or break a pin inside the cylinder. A cylinder that started as a $100 extraction becomes a $250 replacement once a pin is broken inside. The right tool is a hooked extraction pick that grabs the broken end and pulls it out. We carry them on every truck.
Will the lock still work after extraction?
Usually yes. A clean extraction leaves the cylinder unharmed. We cut a fresh key on-site from the broken half (if it's intact) or by decoding the cylinder. The lock works the same as before. The exceptions: keys that broke because the cylinder pins were already worn (the key didn't break randomly, it broke because something inside was binding), or keys that someone tried to force after the break (which usually damages a pin).
Why do keys break in Houston more than other places?
Two reasons. First, Houston humidity corrodes brass key alloys over time, especially on keys that ride in pockets and bags. The metal weakens at the thinnest point (usually right where it meets the shoulder). Second, Houston flood events leave water inside cylinders, which then corrode the pins. A pin that's gummed up with corrosion grabs the key harder than it should, and the key snaps. Pre-Hurricane Harvey, broken-key calls were a normal background rate. Post-Harvey and post-flood events, we see a noticeable spike for weeks afterward.
Can you extract a broken key from a car ignition?
Yes, on most makes. Broken keys in car ignitions are usually transponder keys that snapped where the plastic head meets the metal shaft. We pull the fragment with extraction picks, then cut and program a replacement transponder key on-site. Total cost: $150 to $400 depending on the make/model. If the ignition cylinder itself is damaged, replacement is the next step at $250 to $600.
How long does extraction take?
Usually 15 to 30 minutes on arrival once we have access to the lock. Most of that is positioning and tool selection. The actual pull is often less than a minute. Older Heights and Montrose mortise locks sometimes take longer because the cylinder geometry is different and the extraction tools have to be angled carefully to avoid the lever pack inside the mortise body.
Broken key right now? Call us
Call (346) 594-6316 with what broke and where. Dispatch across Harris County and the surrounding metro. See our residential locksmith service page, our home lockout guide, and the posted cost guide for the full pricing breakdown.
Last updated: 2026-04-29.