
Why Keys Snap — and Why the Fix Requires a Professional Broken Key Extraction
Keys fail for predictable reasons: metal fatigue from years of daily use, a lock cylinder that has become stiff due to worn tumblers or lack of lubrication, forcing a key that was cut slightly off-spec, or applying torque while the key is only partially inserted. Columbia's humid subtropical climate accelerates corrosion inside outdoor locks — particularly on properties near Lake Murray or along older neighborhoods like Earlewood and Shandon — which makes cylinders tighter and keys more prone to shearing under stress. Understanding the cause matters because it shapes the solution. A fragment in a mortise lock, for instance, sits inside a deeper, more complex cylinder than a standard door knob lock, and the extraction approach differs accordingly.
Attempting removal without the right tools is where most of the real damage happens. Tweezers, bobby pins, and glue-on-pencil tricks risk pushing the fragment deeper, scratching the keyway, or breaking off a second piece inside the cylinder. Our technicians are trained to evaluate the fragment's position, the lock type, and the keyway profile before selecting the appropriate extractor or hook pick for retrieval. The goal is always a damage-free outcome where possible, preserving the existing hardware so you are not faced with an unnecessary replacement cost.

