The Original - Patented
The Original StrongJamb Armor Plate
A quarter inch of American steel, mortised flush into your door jamb and anchored to the studs behind it. New to StrongJamb? Start with the DIY Kit - it includes the jig you need to install. Already have the kit? Add plates below.
Watch the full break-in test.
Two doors, two attacks - and the jamb holds.
Steel-edge door (truck test)
Wood door (kick test)
Little but mighty.
The Armor Plate is a formidable first line of defense for any ordinary jamb. Using our Original StrongJamb System and fifty years of door experience, we retrofit that reinforcement into a smaller, far more versatile plate. It solves locking security after a break-in, corrects the adjustment on doors that never hung right, and repairs the opening at the same time - all with traditional or smart lock hardware.
The finished door
The Armor Plate set into the jamb
Strong, and an aesthetic upgrade.
Unlike aftermarket plates that just bolt onto the surface, the Armor Plate is embedded into the jamb - superior security with an integrated, finished look. It cleans up old, poorly chiseled lock points, corrects the adjustment on doors that never hung right, and mortises in flush, so once painted you would not know it was there.
It's finished in Cerakote - the same ceramic coating used on firearms - so it's exceptionally weatherproof and never needs painting. Choose from four colors: black, silver, white, and bronze.
Patented. Made in the USA.
Works with the locks you already trust - even the smart one.
The Armor Plate® isn't a lock and doesn't replace one - it's the steel foundation your lock bolts into. Designed to accommodate electronic and smart locks, so you keep locking your door from your phone. The Armor Plate can be engaged with the push of a button.
Why Armor Plate wins the competition
Armor Plate is superior to any other aftermarket security plate for these reasons:
- Blunt force, prying, and kicking are ineffective at removing or breaking the jamb once an Armor Plate is installed.
- Unlike many aftermarket security plates, the Armor Plate is an aesthetic upgrade.
- Allows unique adjustments on newly installed doors or doors hung years ago.
- Restores security and a working door quickly after a break-in.
- Works conveniently with smart locks and electronic systems.
- Do it yourself, or have your favorite contractor install it.
What makes it different
Not just another aftermarket security plate.
Inconspicuous
Never surface-mounted. It's embedded into the jamb for superior security and an integrated, finished appearance - and it cleans up old, poorly chiseled lock points along the way.
Fits your hardware
Machined to accommodate the vast majority of residential bolts and latch points, with superior adjustment for doors that never hung right.
Anchors into the framing
Rear holes take 3-inch or longer screws that drive force into the structural framing, not the jamb edge - twice the fasteners of the industry standard.
See it in action
Short clips of the install and the break-in test.
Real installs, real doors.
Buy direct
Already have the kit? Get more plates.
A quarter-inch of American steel, mortised flush into your jamb and anchored to the studs behind it. Works with the lock you already own - including smart locks and electronic systems, handled better than our competitors. Patented, made in the USA. You'll need our DIY Kit (jig included) to install - if you don't have one yet, grab the kit first.
New to StrongJamb? You'll need the DIY Kit first - it includes the jig and router bit. A router (power tool) is required to install and is sold separately. Ships from Dayton, Ohio.
View full detailsNew here? Start with the DIY Kit.
The Armor Plate on its own is right if you already own our router jig. New to StrongJamb? You'll need the DIY Kit first - it includes the jig and everything to install (a router power tool is required and sold separately). Once you have the kit, order as many plates as you like.
Common questions
The Armor Plate and the StrongJamb System, answered.
What is the StrongJamb Armor Plate?
A quarter-inch steel plate that mortises flush into your door jamb and anchors to the studs behind it, so the frame holds when a door is kicked. Patented, made in Dayton, Ohio.
How is the Armor Plate different from the Original StrongJamb System?
The Armor Plate is the compact retrofit - it reinforces the strike side of an existing jamb in about twenty minutes. The Original StrongJamb System is our full custom jamb, built for hard-to-fix, historical, or non-standard doors where a whole reinforced frame is the right answer. Same steel philosophy, two different jobs. See the StrongJamb System.
Does it work with my smart lock?
Yes. The Armor Plate isn't a lock and doesn't replace one - it's the steel foundation your lock bolts into. It accommodates smart locks and electronic systems better than competitors, so you keep locking your door from your phone.
Do I need a router to install it?
Yes - a router (the power tool) is required to cut the mortise, and it is not included in the kit. If you hang doors for a living you already have one; otherwise it's a common tool sold separately.
What's in the DIY Kit?
The Armor Plate, the 3D-printed jig, the router bit, and clear instructions - everything except the router itself. Your first purchase includes the kit; after that you can order plates on their own.
Will it be visible on my door?
No. It mortises in flush and paints over, and it's finished in Cerakote - the coating used on firearms - in black, silver, white, or bronze. It's an aesthetic upgrade, not an eyesore.
Where is it made?
Dayton, Ohio. We machine and ship every plate ourselves. Family owned, made in the USA.
Trusted by homeowners and businesses in Dayton
Fifty years of door experience, now protecting doors across Ohio.
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