StrongJamb™ Products for Residential Doors - Repair, Replacement, Repurpose, with Security.
Doors fail at the jamb, not the lock. We fix that with two systems, depending on your door.
The Original StrongJamb System
A full custom reinforced jamb for hard-to-fix, historical, or non-standard doors - the complete redo.
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The Armor Plate
The compact retrofit. A quarter inch of steel that reinforces the strike side of any standard jamb in under an hour.
See the Armor PlateWhy Armor Plate wins
Every reason it beats our competition, in one quick scroll.
Blunt force, prying, and kicking can't remove or break the jamb once an Armor Plate is installed.
No surface-mounted bolt-ons, no chiseled-up jamb left exposed. It mortises in flush and paints over, so once it's finished you'd never know it was there.
A full DIY Kit runs under $100 and installs in about twenty minutes - a fraction of the cost and downtime of replacing the whole jamb.
Once you have the Armor Plate Kit, the whole install takes less than ½ an hour. Do it yourself or have your favorite contractor knock it out!
1/4" steel plate allows for needed adjustments and longer screw strategic placement.
The Armor Plate isn't a lock and doesn't replace one - it's the steel foundation your lock bolts into. Works with smart locks, keyless entry, and traditional keys alike.
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Watch the full break-in test.
Two doors, two attacks - and the jamb holds.
Steel-edge door (truck test)
Wood door (kick test)
Find what you need.
Your entry does not have to look like a fortress to be one. The Armor Plate mortises in flush and paints over - your home still looks like your home, just with a jamb that finally holds.
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Unlike aftermarket plates that bolt onto the surface, the Armor Plate embeds into the jamb for a finished look - it even cleans up old, poorly chiseled lock points and corrects doors that never hung right. Finished in Cerakote, the same coating used on firearms, so it never needs painting.
See the Residential pageFewer broken doors, fewer turnovers, safer residents. Reinforce the jamb once instead of paying to rebuild the same kicked-in frame every turnover.
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Installed at turnover, it adds about twenty minutes to a unit your crew is already in. Volume pricing scales with unit count, and we manufacture in Dayton, Ohio - no overseas supply chain, no six-month backorder.
See the Multifamily pageHiring someone to install your Armor Plate? Here are a few pointed questions to get you both on the same page.
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The right question with your contractor will help you both understand how to achieve a real security upgrade. We put questions together that will help you both feel comfortable with the installation.
See the questionsSee how the install works and what the DIY Kit includes. A router is required and not included - we will point you to one.
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The DIY Kit includes the Armor Plate, the 3D-printed jig, and the router bit - everything except the router itself, which is a common tool sold separately. Most installs take under an hour.
See the install pageWorks with the lock you already trust - smart lock or keyless entry.
The Armor Plate® isn't a lock and doesn't replace one - it's the steel foundation your lock bolts into. Whether you call it a smart lock or keyless entry, it works with electronic deadbolts and keypads, so you keep locking your door from your phone or a code.
See it in action
Short clips of the install and the break-in test.
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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.
What is the lead time?
In most cases you can have your plates shipped within a week. If there is a delay, we will let you know. Expedited shipping is also available at an additional charge.
What is the shipping cost?
Shipping is free for the Armor Plate Kit, which should be your first purchase. For additional products after the kit, shipping charges will be posted when you make your order.
Can you return the plate?
Yes, but it must remain unused and never installed, and be returned in its original packaging. You will receive a full refund after we receive it. You would pay the shipping for the return.
What if I don't have a router?
We recommend you look at the many types of routers on the Harbor Freight website - there's a link to the site on the purchase page. You can find them ranging from $30 to $400. Depending on your need and how many times you think you'll use it, that determines which one you should buy. A $30 router costs about the same as renting one, and having a trim router on hand is very handy.
Trusted by homeowners and businesses in Dayton
Fifty years of door experience, now protecting doors across Ohio.
Prospeed professionally handled the procurement of a sliding door and 2 sliding windows for my Centerville condo (I am an out-of-town owner) and installed them with me on site. Joe Pollard and his crew performed the work and left the condo in good shape. Greg Pollard made sure I was satisfied. I recommend Prospeed for door and window replacement.
Kim is absolutely one of the greatest people I've ever met. The passion and care that they put into their product is second to none and we are truly blessed to know them.
These guys are amazing! If I could give them 10 stars I would!