Technician in black gloves holding a screwdriver at the knob lockset of an open dark door, with a tool bag nearby. — Harmony Hall II

High security · Harmony Hall II

High Security Locks

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You jiggle the key a little and the old deadbolt opens even when the cut does not look quite right. If your worn key can do that, you wonder what a stranger with the right tools could do.

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In plain words

Upgrading to high security rarely means new doors or a big disruption. Many high security cylinders retrofit into the existing deadbolt or lever, so the door preparation stays as it is and only the cylinder and keys change. A heavier deadbolt uses the same bore as the old one in most cases. The strike and hinge screws are swapped for long ones that bite into the framing. The visible difference afterwards is small; the practical difference is that the door resists the tools and tricks that defeat ordinary hardware, and that nobody can copy your key without you knowing.

Sound familiar?Harmony Hall II

The call: After the attempted break-in the police officer pointed at your door and said the strike plate was held by two short screws. Nobody got in, but you have looked at that door differently every evening since.

NextHow the visit goes

High Security Locks · Harmony Hall II

How the visit goes

Technician holding a steel deadbolt to the round bore in a white door, with an open tool bag on a dark mat. — Harmony Hall II

Scene 1
Who holds keys and who should
For a business or a rental, the locksmith asks to see the key list, or helps you start one. Which keys exist, who carries them, which doors they open, and what happens when someone leaves. This is where the case for a patented or restricted key system becomes clear, because the system replaces guesswork with a register: every key numbered, every order authorised by a named person, and no blanks available outside the locksmith who manages it. The locksmith also asks how many people need to reach each area so the keying plan reflects the way the building actually runs.
Scene 2
Retiring the old keys and closing gaps
Part of the visit is making the old keys meaningless. Once the new cylinders are in, every previous key is tried to confirm it no longer operates anything, and any remaining door on the old keyway is either upgraded or at least rekeyed so an unknown copy has nowhere to go. The locksmith also closes small gaps found during the assessment: replacing hinge screws with long ones, adjusting a closer, adding a cylinder guard, or moving a thumb-turn away from glass. The door leaves the visit as one coherent assembly rather than one strong part among weak ones.
Scene 3
Watching the patent calendar
Patented keyways protect you for as long as the patent lasts. When it expires, blanks may be sold openly and the copy-control layer weakens, though the mechanical resistance of the cylinder stays. The locksmith notes the patent term of your system at handover so the date is not a surprise. Many years before it arrives, the same hardware can usually be moved to a newer patented keyway by changing cylinders and keys while the lock bodies stay. Treat it like a roof: nothing needs doing for a long while, but the date is written down.

In the van

Wrap-around door reinforcer
Three-inch strike and hinge screws
High-security cylinder
Code key cutting machine
Box strike

What shapes the quoteAncaster Heights Locksmith Pros

Number of doors: Each door gets its own cylinder or lock, strike work and testing. Several doors on one keyway share the setup cost of the key system but add hardware and time per opening.
Key control level: A patented keyway with authorisation cards covers most homes. Geographically exclusive keyways and signature-controlled systems for businesses carry registration and administration that show in the quote.
Mortise and older doors: An existing mortise pocket, a thick slab door or an unusual backset can mean a specific cylinder or an adapted preparation, which takes longer than a standard bore.

FeesSame any hour

Have it ready

Before you call · 0 / 3

Is the door wood, steel-clad, fibreglass or aluminium with glass?
Is this a house, condo, rental unit or business premises, and do you own or manage it?
How many keys exist today, and are you confident of that number?

(289) 203-6954

Your questions, our answers

What is bumping, and does this stop it?

Bumping uses a specially cut key that is struck while under light turning pressure, bouncing the pins to the shear line for an instant so an ordinary cylinder opens. It works on many standard pin tumblers. A high security cylinder needs its sidebar released by separately positioned finger or rotating pins at the same moment, and a bump key cannot set those, so the plug stays locked. It is one of the clearest advantages of the upgrade.

What is the difference between restricted and patented keys?

A restricted keyway is one the manufacturer supplies to a limited set of dealers, so blanks are harder to obtain but not legally protected. A patented key design is protected by a patent for a fixed term, and making or selling the blank without permission is unlawful during that time. Patented systems give the firmer control; restricted ones give a useful step up. The locksmith explains which your chosen line uses and when any patent expires.

What happens when the patent on my keys runs out?

The mechanical resistance of the cylinder does not change, but blanks may become openly available, so copy control weakens. Manufacturers issue new patented keyways as older ones expire, and the usual answer is to move to the next generation by changing cylinders and keys while keeping the lock bodies. Your locksmith notes the patent term at handover so the date is on the calendar rather than a surprise years later.