Person in safety glasses holding a small metal lock cylinder beside a workbench with a red cloth and an open car door. — Thornhill

High security · Thornhill

High Security Locks

Open 24/7

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.

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In plain words

This service suits anyone who wants to stop wondering. Homeowners who have inherited unknown keys with a house, landlords who want one controlled key system across units, and businesses protecting stock, records or medication all ask for it. The locksmith explains the choices in plain terms, from a graded deadbolt with a patented cylinder up to laboratory-rated cylinders and heavy commercial lock bodies, and helps you decide which doors deserve which level. Then the work is done cleanly, every key is tested in every lock, and you leave with the documents that let you control future keys.

Sound familiar?Thornhill

The call: 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.

NextHow the visit goes

High Security Locks · Thornhill

How the visit goes

Bunch of keys hanging from a key in a door lock, beside a black knob and the door's metal edge plate. — Thornhill

Scene 1
The bolt, the pocket and the strike
A deadbolt is only as good as how far it reaches and what it reaches into. The locksmith measures the throw of the bolt with the door closed, checks that it fully extends without the door being lifted or pushed, and looks at the pocket it enters in the jamb. A shallow pocket, a stamped strike plate and screws barely longer than a thumbnail are the usual finding on a builder-grade door. Then the frame is examined for splits, soft wood and gaps behind the jamb, since a kick lands on the strike, not on the cylinder.
Scene 2
Reinforcing the strike and frame
The strike is where a forced door actually fails, so it gets serious attention. The stamped plate comes off and the pocket is deepened to accept a box strike or a long reinforced strike, fastened with three-inch screws that pass through the jamb into the wall framing. Stripped or split wood is filled and doweled first so the screws have something to hold. Where the frame is thin, a wrap-around reinforcer around the door edge and a full-length jamb plate are options. The result is a bolt that ties the door into the house rather than into a strip of trim.
Scene 3
Proof for insurers, landlords and tenants
You leave with a written record of what was fitted: the cylinder type and its rating, the deadbolt grade, the strike and screws installed, and the key system registration. Insurers sometimes ask for this when a policy specifies stronger hardware, landlords keep it in the property file, and tenants have something to hand back at move-out. It also helps the next locksmith, who can see at a glance what keyway and format the doors carry. Keep the invoice and the key control documents together; they are the paperwork side of a physical upgrade.

In the van

Reinforced strike plate
Code key cutting machine
Pinning kit and plug follower
Hardened cylinder guard ring
High-security cylinder

What shapes the quoteSteeles Corners Locksmith Services

Number of keys cut: Every key is cut from code on a machine that handles side bitting or angled cuts, so the count of keys you want at handover is a real line rather than a rounding error.
Exit devices and closers on the same door: Where a commercial door carries a push bar or closer, the new lock must work with them, and adjusting or replacing that hardware is part of the same visit.
Cylinder only or full deadbolt: Swapping the cylinder inside a sound deadbolt is a smaller job than fitting a new graded deadbolt through the door, and a knob-only door that needs a fresh bore is bigger again.

FeesSame any hour

Have it ready

Before you call · 0 / 3

Is this a house, condo, rental unit or business premises, and do you own or manage it?
Is the door wood, steel-clad, fibreglass or aluminium with glass?
For a business, who should be allowed to authorise new keys?

(289) 216-9485

Let's clear a few things up

How long does the installation take?

A cylinder swap with new keys on one door is a short visit. A new deadbolt, reinforced strike and frame repair takes longer, and several doors keyed to a plan take longer again, mostly in bench time pinning cylinders. The locksmith gives you a realistic estimate once the doors have been looked at, because the frame condition and the door preparation matter more than the count of locks alone.

What does key control mean in practice?

It means your key can only be copied through the locksmith who manages your system, after checking that the person asking is on your list of authorised names. Blanks for the keyway are not sold to hardware stores or kiosks while the patent lasts. Each key is numbered and recorded, so you know how many exist. For a home that ends the worry about old copies; for a business it turns a lost staff key into a known, manageable event.

Will my door look different afterwards?

Barely. A high security cylinder sits in the same place as the old one and is usually distinguished only by a different keyway shape and sometimes a hardened collar. A graded deadbolt is a standard-looking deadbolt in your chosen finish. The reinforced strike is longer than the plate it replaces and the wrap-around reinforcer, if used, shows as a neat metal band on the door edge. The difference is felt when you lock up, not seen from the street.