Some keys can be copied in minutes. Others need blanks, codes, proof of ownership or a locksmith who understands the lock system.
Most people only think about key cutting when they need one spare in a hurry. Sometimes that is simple. A standard cylinder key can often be copied quickly. Other keys are restricted, worn, unusual or tied to a security system, which is why a kiosk or supermarket machine may refuse them or produce a copy that never works smoothly.
Restricted keys are meant to be controlled
Restricted key systems are designed so copies cannot be cut casually. They are common in offices, managed blocks, commercial units and some higher-security homes. You may need an authorisation card, code or named account before a duplicate can be made. That is the point: it stops anyone with temporary access from quietly making a spare.
A worn key can copy the problem
If your only working key is bent, thin or badly worn, copying it can reproduce the wear rather than the original shape. The new key may work poorly or not at all. In those cases, it is better to inspect the lock and cut from a code, original, or known-good reference where possible.
Keys that often need more care
- Mortice keys for older timber-door locks, especially if the key is worn or oversized.
- Safe, cabinet and locker keys where the blank is less common.
- Restricted office keys that require authorisation before duplication.
- High-security cylinder keys with unusual profiles, dimples or side cuts.
- Broken keys where the pieces need checking before any duplicate is made.
When a lock change is better than another copy
If you have lost track of who has keys, if a former tenant or staff member may still have one, or if the lock is old and unreliable, cutting another key does not solve the security problem. A cylinder change gives you a fresh key set and retires all old copies immediately.
That is especially useful after a house move, a staff change, or a lost-only-key situation. See our guides on changing locks after moving house and lost only keys for the security side of the decision.
What to bring or send
- A clear photo of both sides of the key.
- A photo of the lock faceplate or cylinder if you are not sure what it is.
- Any code, card or ownership paperwork for restricted systems.
- All broken pieces if the key has snapped.
Two Keys Security provides key cutting and lock advice across Egham, Richmond, Feltham and Hounslow.
Key cutting
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