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Mace 80115 MACE Big Jammer Door Brace

4.5 out of 5 stars 157 customer reviews
| 8 answered questions

Price: $25.99 & FREE Shipping on orders over $49. Details
Only 8 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
  • Enter your model number above to make sure this fits.
  • Installs easily under door knob and provides added security for home or business
  • Collapsible, easy to store design
  • Includes security bracing pin for added strength
  • Adjusts to fit most hinged doors, and the end caps can be removed to allow for use on sliding glass doors
  • Free safety tips included
7 new from $20.00 1 used from $23.39

Father's Day deals in Tools & Home Improvement
$25.99 & FREE Shipping on orders over $49. Details Only 8 left in stock (more on the way). Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Mace 80115 MACE Big Jammer Door Brace
  • +
  • Master Lock 265DCCSEN Dual-Function Security Bar
  • +
  • GE Personal Security Door Stop Alarm
Total price: $52.29
Buy the selected items together

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Product Description

The Big Jammer Adjustable Door Brace features strong 20 gauge steel and is ideal for home, dorm, apartment or office use. This brace works on both hinged and sliding doors. It adjusts to fit most standard doors, and installs easily under your door knob to provide added security for your home or business. Its collapsible design makes it easy to store when not in use. This brace also includes a Security Bracing Pin for added strength.

Product Information

Technical Details

Part Number 80115
Item Weight 2.5 pounds
Product Dimensions 32.2 x 5 x 4 inches
Origin China
Item model number 80115 MACE
Item Package Quantity 1
Warranty Description 1 year

Additional Information

ASIN B0009V2LU2
Customer Reviews
4.5 out of 5 stars 157 customer reviews

4.5 out of 5 stars
Best Sellers Rank #62,607 in Home Improvements (See top 100)
#39 in Home Improvement > Hardware > Nails, Screws & Fasteners > Braces
#429 in Home Improvement > Hardware > Padlocks & Hasps
#9,794 in Home Improvement > Safety & Security
Shipping Weight 2.5 pounds (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available October 2, 2001

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Customer Reviews

Top Customer Reviews

Verified Purchase
It arrived today and is going back to Amazon for a refund tomorrow. It looks secure when you put it in place, and feels secure when you test it by pulling inward on the door handle, but test it by going outside pushing on the door and you will be shocked at how easy it is to defeat. The rubber ears on the doorknob end are too flexible and bend out of the way (to the side and down) when you push on the door allowing the door to be very easily opened. The entire top rubber assembly also flexed slightly to the side on the metal pole as it was defeated. It's secured to the end of the metal pole about as well one of those rubber erasers that slip on to the end of your pencil. What's worse is that because the thickest parts of the pole, the top ears and the bottom foot, are made of soft rubber they were silent and made no racket as I pushed on the door. Furthermore since no metal parts hit the floor when it fell to the ground it landed very quietly. The rubber ears are what impacted the floor as it fell to the floor after being defeated, the rubber foot was already on the ground as it fell. I got in the door silently in less than 5 seconds. The tap from a lock bump would be the loudest thing you would hear. Get a puppy from the pound and a 12 gauge instead and sleep well, it's well worth the $400 total initial investment + dog food. I do weigh 240#, but I didn't have to push hard at all to get in. A false sense of security thinking that you would hear some serious racket as this thing got defeated is worse than not having it at all. What I was using before I tried this, and what I will go back to using, was a chair with the legs sitting inside some rubber soled tennis shoes to keep the chair legs from slipping on the floor.Read more ›
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Verified Purchase
I purchased two Master Lock 265DCCSEN Dual-Function Security Bars about 4 months after looking at the various options out there (including the Mace Big Jammer.) The MasterLock Product seemed to function well and kept the door secure against some 'simulated assault' - I am 200 pounds and applied full/moving force with the door handle AND deadbolt disengaged.

Side note: all of these door jam type products perform well on a hard surface (tile/wood/linoleum.) They are NOT well suited to carpet.

Disappointment Part 1: One day, I returned home to find that my door jam (not engaged as I was away from the house) had fallen over (I keep it next to the door when not in use.)

Much to my surprise, the impact from the fall (slide) to the floor had caused the end of the door jam that notches under the door handle had SHEARED OFF! I hadn't really noticed before but the 'business end' of the door jam was PLASTIC! Needless to say, I was not impressed at this obvious design flaw.

Disappointment Part 1: I picked up the phone to call MasterLock... I'll spare the details but end result was as follows. a) MasterLock does not offer a replacement part for this plastic piece (despite the fact that it has a cotter pin for removal.) b) the customer service rep spent 10 minutes trying to convince me I had to return the device to the seller (they didn't want to bother with it.) c) when I basically forced the rep to admit that..."Yes...they do actually provide warranty service" - my only option was to mail the entire product (at my expense back to Masterlock.) d) She could only give me the return address verbally (sorry, I can't email that to you...
Read more ›
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Verified Purchase
I put these things on every entry door of my house and love them. They give you a little extra time to react in the event of a home invasion type scenario. With enough force these can be defeated by an angry linebacker or a massive herd of zombies. Like I said, it will give you those few extra moments to reach your weapon and begin the process of eradicating the evil doers.
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Verified Purchase
Having used this door brace for over a year now, I highly recommend it for safety in your home.

When properly aligned under the doorknob, the black rubber piece at the top will be slightly bent. This means that it is snug in place. Anyone who finds that it slips or slides is simply not taking the extra few seconds to give it a final nudge. I would purchase the Mace door jammer again and probably will, but for now, this one is holding up great.
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Verified Purchase
I have been very satisfied with this product. I put it the test and it absolutely did what it was made to do.
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Verified Purchase
Someone tried breaking into my apartment door while I was home so I decided to purchase this device. I sleep much better because of this device. I have tested this out on a couple doors and it works great. I feel the door itself would break from the hinges or the door handle would break before this device would give way. This device would give me ample time to wake up, call the police, and setup a couple painful surprises for anyone that would make it past the door.

I feel that the amount of time, effort, and noise needed to break down a door with this device on it would not be worth it for a burglar. It is very easy to unarm when you are wanted to open the door, which would be important in an emergency such as a fire.

I saw the Master Lock version of this device and it is NOT constructed as good as the Mace version.
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