
Locksmith · London
Straight answers about locks
These are notes, not lectures. Each one takes something people often get wrong about locks and keys, explains it in a paragraph or two, and leaves you better placed to decide what your doors need and what they can happily do without.
Call now · open 24/7(226) 777-6122- Service bulletin 1Mailbox Lock Replacement: comparing quotesYes. A compartment door that has been pried at, dropped on a loose hinge, or pushed out of square over time is straightened or adjusted as part of the same visit, since a bent door will fight even a brand new lock.Read
- Service bulletin 2Lock Replacement & Upgrade: what the visit coversLock replacement and upgrade is the service that takes tired or under-built door hardware off and puts hardware suited to the door in its place. It ranges from a like-for-like deadbolt on a back door to a complete refit…Read
- Service bulletin 3Car Key Replacement: getting readyYou bought the car privately and it came with a single key on a shoelace. Every time it leaves your hand you notice, and you would like a second one made before the first goes missing.Read
Ask us anything about locks

Lockout Services
Can a frozen lock be opened, and how do I stop it freezing again?
Frozen cylinders open well with patience: lock de-icer or gentle warming melts the ice so the plug turns, and the cylinder is then dried and treated with a dry lubricant that sheds moisture. Hot water is avoided because it refreezes and can crack cold metal. To prevent a repeat, keep a storm door closed over the main lock, fit a keyhole cover on exposed side doors, and carry a small de-icer in your coat or car through the freeze-thaw months. Home Lockout Service
The key snapped off inside the lock. What happens now?
The broken blade is removed with extractors that grip it and draw it out toward the face, then the cylinder is opened normally. Keys rarely break in a healthy lock, so the cylinder is cleaned, the cam behind it checked for stiffness, and a dry lubricant applied. A new key is cut from the code or from the two pieces rather than from a worn spare, since a tired copy is usually what broke. Business Lockout Service
Can a new key be made from the two broken halves?
Usually. Laid end to end, the halves show the full set of cuts and identify the blank, and a locksmith reads them with a gauge and cuts a fresh key to those depths on a code machine. That is better than tracing the broken blade on a duplicator, because a worn key copied is a worn key repeated. If a spare or the key code exists, that is used instead. Broken Key Extraction
Should I keep the broken lock and strike?
Yes, unless the insurer has already said they are not needed. Insurers generally ask policyholders to retain damaged property until the claim is settled, and a bag holding the twisted cylinder, torn strike and split wood answers an adjuster's questions more clearly than any description. The locksmith hands them over at the end of the visit along with a written note of what was replaced. Photographs of the parts in place, before removal, complete the record. Break-In Damage Lock Repair

Change or Rekey Locks
Do the old keys really stop working?
Yes, at every cylinder that was rekeyed. Once the bottom pins are changed, a key cut to the old combination lifts them to the wrong heights and the plug will not turn. The locksmith proves this at each door by trying the old key after the new one, because any door missed from the list would still answer to the old key. That is also why the walk around the property at the start matters: every door meant to be included has to be on the list. Lock Rekeying
Does the finish of the deadbolt matter beyond looks?
It does on an exposed door. Winter salt spray, summer sun and humid air all work on the outside trim, and residential deadbolts carry a finish grade that reflects how well the coating resists them. A lifetime or PVD-style finish stays bright longer on a south-facing or roadside door, while a sheltered porch door can carry any finish you like. Matching the knob or lever below is mostly a matter of taste. Deadbolt Installation
My door has glass beside it. Should I fit a deadbolt keyed on both sides?
A keyed interior cylinder means finding a key to get out, which is not what you want on a door people use every day. The steadier answer for a door with glass is a single-cylinder deadbolt with a thumb-turn, combined with a reinforced strike, a longer bolt and a security film or laminated glass in the sidelight. Lock Replacement & Upgrade
What exactly is a mortise lock?
It is a lock built as a flat rectangular case that sits inside a pocket cut into the edge of the door, rather than through a round hole bored across it. The case holds the latch, usually a deadbolt, the hub the knob spindle turns, and the springs. On the faces of the door you see the knobs, decorative plates and either a keyhole for a bit key or a round cylinder. Most doors built before the middle of the last century carry one. Vintage Mortise Lock Service

High Security Locks
Can a safe be repaired instead of replaced after drilling?
Often, yes, particularly for a mechanical lock, where a worn wheel pack, drive cam or spindle can be replaced individually within the existing lock body. An electronic lock's circuit board and keypad are less often repairable in place and are more commonly swapped for a comparable or higher-rated replacement unit that fits the same cutout. Safe Opening & Combination Change
Can the combination or code be changed after installation?
Yes, on both mechanical and electronic locks. A mechanical dial is reset to a new combination by working inside the lock body, while an electronic keypad is simply reprogrammed at the keypad or through its service menu. Changing it after a change in staff, a move, or simply out of caution is routine work rather than anything unusual, and it can be arranged as its own visit. Safe Installation & Servicing
What information helps before the visit?
A photo of each door's lock from inside and outside, the type of door, whether there is glass nearby and roughly how many keys are in circulation. For a business, a sketch of the doors and who needs to reach each area saves a great deal of time. Mention any door that sticks, has been forced or has a closer or push bar on it. With that, the locksmith arrives with the right formats and a plan to discuss. High Security Locks

Commercial Locks
What is the difference between rekeying a business and replacing its locks?
Rekeying keeps every lock on the door and changes only the pins inside the cylinder, so a new key works and the old ones stop. Replacing swaps the hardware itself. Commercial cylinders are made to be repinned many times, so rekeying suits any lock in sound condition and leaves the levers, trim and door untouched. Replacement is chosen door by door for cylinders that are worn, corroded or too light for what they protect. Commercial Rekeying
Who should hold the top-level master key?
As few people as the business can genuinely operate with. Every additional holder is another way a full-access key can be lost, borrowed or copied without anyone deciding that should happen. A useful test during design is asking, for each proposed holder, whether they need to open every single door on the property or only a defined group; the second answer usually points to a sub-master instead. Master Key System Design
Is a keypad code as secure as a card or fob?
A keypad code needs no card to lose, but a code shared among several people is effectively no longer individual, and a forgotten code left active is a common weak point. A card or fob tied to one named person avoids that particular issue, since it is switched off individually rather than reset for everyone at once. Many businesses use a code for general areas and a card wherever entry needs to be traceable to one person. Access Control Installation
How much force does the door need to open with?
Hardware standards set a maximum, not a target: an exit device is built to release the latch under a firm push, no more than about 15 pounds of force applied at the touchpad or crossbar, roughly the pressure of a light shove rather than a heave. That ceiling covers people who cannot lean hard into a door, so the swing stays open to anyone moving toward it under pressure. Panic & Exit Hardware

Car Keys
How long does a car lockout take once the locksmith arrives?
Confirming identification and looking the car over take a few minutes, and the opening itself is often the shortest part. A wedge-and-reach entry or a picked door cylinder on a common car is a matter of minutes; a frozen lock, a dead car battery or a car with hidden cylinders takes longer. Cutting and programming a replacement key is a separate stage that adds time, and you are given a sense of it before it starts. Car Lockout Service
Does programming a new key affect the keys I already have?
Adding a key leaves the existing keys in place; the car simply learns one more. The exception is a deliberate all-keys-lost reset or an erase you ask for, which clears every stored key and then registers only the ones you present. For that reason the locksmith asks you to bring every key you own to the visit, so each one can be re-registered and tested rather than left behind and forgotten by the car. Car Key Replacement
Is there a reason to make a spare now rather than waiting until the original is lost?
The whole process depends on having a working key to read or trace from, so making the spare while that key still exists is simpler than the alternative of proving ownership without any key present and building access from scratch. A spare made now also means a future lost key is solved by reaching for the second one already tested and waiting, rather than starting the whole process from nothing. Spare Car Key Duplication
Can you program a fob for a new driver without touching the fobs we already use?
Yes. Adding a fob for another driver joins it to the vehicle's accepted list alongside the fobs already there, and on many vehicles the ones already in daily use are not re-registered or disturbed in the process, though some procedures need every fob present and re-registered together. Each fob keeps its own identity in the vehicle's memory even though they all operate the same doors and engine. Key Fob Programming
Open 24/7
Request a visit
Call to discuss your business's keys.
Call now · open 24/7(226) 777-6122- On-site assessment preferred
- Same fees day, night or weekend
- 23 years in business