Search  for anything...

DoorJammer Portable Door Lock Brace for Home Security and Personal Protection (DJ4LD - Lockdown (XL Version)))

  • Based on 804 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $8.33 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Apr 1
Order within 10 hours and 34 minutes
Available payment plans shown during checkout

Style: DJ4LD – XL Heavyweight (Lockdown Edition)


Features

  • ONLY FOR INSWINGING DOORS WITH 18 CLEARANCE - This portable, industrial strength door security device prevents unwanted entry. It takes just moments to fit in the gap under an inswinging door without needing tools and uses displacement of force to barricade the door against an attempt at forced entry.
  • TRIED & TESTED - At twice the size and a height of 7.5" inches, Lockdown is the heavy-duty big brother of award-winning original travel safety device DoorJammer.
  • DESIGNED FOR COMMERCIAL USE - Created for emergency deployment in public buildings, schools, offices or hotels, this is the last word in portable stopping power.
  • QUICK SETUP & RELEASE - Takes only seconds to install and remove. No tools are required to implement this revolutionary home security device. In case of emergency, the quick-release easily removes the Lockdown with an upward motion.
  • HIGHLY VERSATILE - Compatible with all types of flooring, the innovative system of hinges and angles anchor the Lockdown firmly to carpeted, tiled and laminate floors when outside pressure is exerted on the door.

Material: Alloy Steel


Brand: DoorJammer


Color: Dj4ld - Doorjammer Lockdown (Heavyweight)


Exterior Finish: Aluminum


Item Dimensions LxWxH: 5 x 3 x 7.55 inches


Manufacturer: ‎Penn-Elcom


Part Number: ‎DJ-Parent


Item Weight: ‎1.8 pounds


Product Dimensions: ‎5 x 3 x 7.55 inches


Item model number: ‎DJ4LD


Is Discontinued By Manufacturer: ‎No


Color: ‎Dj4ld - Doorjammer Lockdown (Heavyweight)


Style: ‎DJ4LD – XL Heavyweight (Lockdown Edition)


Material: ‎Alloy Steel


Installation Method: ‎Screw In


Item Package Quantity: ‎1


Batteries Included?: ‎No


Batteries Required?: ‎No


Warranty Description: ‎Manufacturers Warranty


Date First Available: September 24, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Apr 1

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Klarna Pay in 4
  • PayTomorrow Financing
  • Apple Pay Later
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Serves the purpose
Style: DJ4LD – XL Heavyweight (Lockdown Edition)
I like it. Very easy to use and serves the purpose. Very useful especially when faced with neighbors---people who just open doors of others without knocking. It would also give a better assurance when placed under the door at night. I tried to open the door after using it and --- couldn't open it.
Reviewed in the United States on August 7, 2023 by J Kityo

  • This works great!
Style: DJ4LD – XL Heavyweight (Lockdown Edition)
This is a great product to have for home security and it's very easy to use.
Reviewed in the United States on August 14, 2023 by Leslie Watson

  • Quality and heavy duty
Style: DJ4LD – XL Heavyweight (Lockdown Edition)
Not a bad item. But it doesn’t work to secure a door which borders a tile floor. The unit slips off. Tried it on a carpet and cement floor and worked fine. But I needed it for a tile floor so I returned it.
Reviewed in the United States on November 3, 2022 by Gary

  • Too short.
Style: DJ4LD – XL Heavyweight (Lockdown Edition)
I travel often sleep in diffrent hotels and cities arund the world. So i was excited to see this product. Worked very well on 2 hotel doors slept much better knowing door was secured from inside. I have had many many times a maid or some unknown person has been able to just open the hotel room door and I have many many times been issued a hotel room key by mistake to a occupied hotel room. And until last year I thought i would be safe by using the little swing latch on the hotel door to lock from inside. However a hotel worker said they have a tool to open the door from the outside. And with terrorism and hostage situations I decided to spend the 50$ for this door hammer. Hpwever i found on many doors it is too short. And when I'm screwing out the door stopper portion it maxed out. And the screw piece feels like it will just fall off if pressure is put on the door from opening. So this item will work on some doors but if the hotel room door is 1 or 2 inches off the ground then the door jammer is not long enough and not affective. ... show more
Reviewed in the United States on March 7, 2020 by Nigel Buff

  • Works!
Style: DJ4LD – XL Heavyweight (Lockdown Edition)
This review is for the larger model, so plain & simple, it does the job as far as I was unable to pull my unlocked door open with this at the bottom. Will give you enough time at least if they get in to have them say hello to a nice blast of pepper spray. Very simple to use and doesn't slide once it's locked in. If I was female I'd get this especially if all you have are wooden doors with glass. Be safe!!!! ... show more
Reviewed in the United States on September 22, 2022 by Marc

  • A must buy
Style: DJ4LD – XL Heavyweight (Lockdown Edition)
With the rate of violence in the workplaces and schools increasing this is a must buy! I bought for my sister since she works in a school. We tested it out and I’ll tell you the only thing that was broken down was my body after trying to get the door down. I’m VERY happy with this! Knowing if an emergency lives will be saved!! She was able to install it within seconds and I was Very impressed with not only the price but how powerful such a small item is! ... show more
Reviewed in the United States on August 19, 2022 by Brittney Jackson

  • Metal bent after a single attempt to enter.
Style: DJ4LD – XL Heavyweight (Lockdown Edition)
I do not suggest this product! I purchased this item almost a year ago. As a teacher I look for any way possible to keep my students safe. The first line of defense is not letting the person get in your room. During our active intruder drill I set this up as I had practiced multiple times. It took two less whacks on the door for the metal to bend and the door to open. I desperately wanted this to work, to give not only myself but my students a sense of security. Unfortunately this was not the case. ... show more
Reviewed in the United States on July 19, 2023 by Amazon Customer

  • Sturdy but meant more for interior doors...
Style: DJ4LD – XL Heavyweight (Lockdown Edition)
Unfortunately I don't believe this is meant for an exterior door. Especially one with a 1/4"rise from the floor. I ordered the extral large version of the door jammer (dj4ld-xl) but the bolt that braces the device against the floor is NOT long enough to properly secure the door because of the jam of the exterior door frame. Sturdy device however and the physics appears sound; i have no doubt it'd work well at a hotel or apartment. ... show more
Reviewed in the United States on May 13, 2022 by jpwage79

Can't find a product?

Find it on Amazon first, then paste the link below.