A key that snaps off in the cylinder is one of the most common winter calls we get on the Front Range, and one of the easiest to make worse with the wrong fix. Here is how to handle it.
A key almost never snaps because of one bad day. It snaps because a worn key meets a worn or stiff cylinder, and the extra force you apply to turn it finds the weakest point in the metal. On the Front Range, cold makes this worse: brittle winter metal plus a frozen or grit-packed lock is the classic recipe for a January break.
Three things stack up to cause most breaks. First, a thin aftermarket copy, the kind cut at a kiosk, flexes and fatigues faster than the original. Second, a cylinder full of dust, and our spring winds blow plenty of it, drags and binds, so you crank harder. Third, freeze-thaw moisture inside the lock stiffens the pins. Push a tired key into that and it gives.
So if your key has been catching or needing a wiggle for weeks, the break was not random, it was the warning you got. We cover that slow decline in our Denver lock maintenance guide, because servicing a sticky cylinder is far cheaper than the break it leads to.
The instinct is to fix it fast, and that instinct is exactly what turns a simple extraction into a lock replacement. The single most important thing is to stop applying force the moment the key breaks. After that, only one DIY move is worth trying, and only under one condition.
That glue trick deserves a special warning. Super glue on the broken stub almost always bonds the fragment to the cylinder instead of to whatever you stuck in, and a glued cylinder is usually a rekey or replacement, not a pull. We have turned plenty of $90 extractions into bigger jobs because of a glue attempt that felt clever at 11 p.m.
A clean extraction is one of the more affordable locksmith jobs there is. A daytime call usually lands in the residential range of $65 to $200, with a simple straight pull at the low end. Cutting a fresh key on site adds a modest amount on top. After-hours, overnight, and weekend calls usually run $150 to $300 because of the premium drive across the metro.
There is one variable that can move the bill. If the cylinder was already worn or got damaged during the break, a rekey afterward makes the lock reliable again, and a full home rekey usually runs $150 to $300. A good tech tells you up front whether that is needed and why, rather than tacking it on as a surprise. For the full picture on hourly and per-job pricing, see our Denver locksmith cost guide.
Whatever the figure, get it quoted in full before any work begins. Colorado has no statewide locksmith license, so the only protection against a $39-on-the-phone, $250-at-the-door routine is a written total you agreed to first. That holds for an extraction the same as for a lockout.
Not usually, but sometimes, and the difference is worth understanding. If the key simply snapped from fatigue and the cylinder is sound, extraction plus a fresh cut puts you right back where you were. The lock is fine and your other keys still work. Most residential breaks fall into this category.
Rekeying enters the picture in two situations. One, the cylinder itself was failing, which is often why the key broke, so resetting the pins restores smooth, reliable operation. Two, you have lost track of who holds copies, which is common right after buying a home or turning over a rental. In that case the broken key is a good prompt to rekey for control, and our rekey vs replace guide walks through when each makes sense. You can also see full coverage on the Denver and Lakewood service-area pages.
Almost always, yes. A locksmith uses thin extraction tools that grab the broken piece and pull it free, leaving the cylinder intact and usable. Replacing the lock is rarely needed just because a key snapped. The exception is a worn or seized cylinder that was already failing, which is often why the key broke in the first place.
Cold metal is more brittle, and a frozen or grit-packed cylinder takes more force to turn. When you crank harder on a stiff lock in January, a worn key, especially a thin aftermarket copy, snaps at its weakest point. Front Range freeze-thaw cycles and the dust that blows in off the plains accelerate the cylinder wear that sets this up.
A straightforward extraction usually runs in the residential service range of $65 to $200 for a daytime call, with a simple pull at the lower end. Cutting a fresh key on site adds a modest amount. After-hours calls usually run $150 to $300. If the cylinder needs rekeying afterward, that adds the rekey cost, usually $150 to $300 for a full home.
You can try gentle methods if the broken end sticks out enough to grip with needle-nose pliers, pulling straight, never twisting. But if the piece is flush or recessed, stop. Tweezers, super glue, and broken jigsaw blades usually push the fragment deeper or score the cylinder, turning a simple extraction into a lock replacement.
Yes, and it is best done on the spot. Once the broken piece is out, you are short a working key, so a mobile locksmith cuts a fresh one on site from the cylinder or a remaining copy. Cutting from a fresh blank rather than from the snapped one matters, since the old worn copy is part of why the key failed.
We extract the broken piece without wrecking the lock, cut you a fresh key on site, and tell you honestly whether the cylinder needs servicing. Local, insured, full price quoted before we start.
Last updated: May 28, 2026.
