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🛡️ Lock it down fast, live fearless.
The DoorJammer Lockdown (XL Edition) is a portable, industrial-strength door brace engineered for inswinging doors with a 3mm clearance. Crafted from durable alloy steel and designed for commercial use, it installs in seconds without tools and anchors securely on all floor types. Ideal for professionals seeking quick, reliable security in homes, offices, or public spaces, it provides a robust barrier against forced entry while being lightweight and easy to carry.













| ASIN | B07HM9HVN4 |
| Best Sellers Rank | #112,983 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #101 in Door Closers |
| Brand Name | DoorJammer |
| Color | DJ4LD - DoorJammer Lockdown (Heavyweight) |
| Customer Reviews | 4.1 4.1 out of 5 stars (978) |
| Global Trade Identification Number | 00814953024118 |
| Item Weight | 1.8 Pounds |
| Manufacturer | DoorJammer |
| Manufacturer Part Number | DJ-Parent |
| Manufacturer Warranty Description | Manufacturers Warranty |
| Material Type | Alloy Steel |
| Model Number | DJ4LD |
| Mount Type | Floor Mount |
| Number of Pieces | 1 |
| Product Style | DJ4LD - Lockdown (XL Version) |
| UPC | 814953024118 |
| Unit Count | 1.0 Count |
A**R
Works great
Easy to use
P**S
Works Great!
Works exactly as described. When placed directly below the door knob and screwed down properly — the door did not budge open when force was applied. I have used the “stick” type door stop but it stopped working in less than 2 months after the “foot pad” i.e. the part in touch with the floor (mine was vinyl tile) wore out.
J**.
Heavy duty easy use
Worth every penny. I love it. Works perfect. Going to buy more.
G**Y
Quality and heavy duty
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.
K**T
This product doesn’t work on doors with normal household thresholds
Why did you pick this product vs others?: This product doesn’t work on doors with normal household thresholds. Screw length is too short. Pivot mechanism prevents tight fit. Discovered too late and missed return window, so we’re stuck with them. Expensive mistake. Caveat emptor.
J**D
Security excels
No need for any photo or fancy movie to review these. These things work, they are very easy to install and very difficult, if ever, to overcome; door hardly moves while in use. I struggle to admit that anything made in China fancies me, but I am going to purchase again another set for my daughter who is an elementary teacher. Yes, that thing will definitely be handy if needs be, the "lockdown" name is quite appropriate. I do not know the material but it is strong enough to give enough minutes to be "prepared" inside a house or apartment, and also to dissuade an 'intruder' from spending interest, time and effort to overcome its 'protection'. Watch the other reviews for how to use it if you need. The instruction booklet included is written for 'supervision' which I do not have, but I can use my own logic and that was enough to learn how to operate the main item, for the extra rubber gadgets go online. I am 100% satisfied and I do not care for the price (you receive two anyway) or other brands, I will purchase a second pair right now (I received them today). Whether you call 911 or 811 these things will give you precious time on inside doors too!
C**N
Sturdy
Extra safety
E**Y
Does not work alone
Can't be applied quickly, so it's not safe for emergencies. There is a specified minimum door gap in the description, but it also doesn't work in a gap of more than half an inch. In my experience, it only works reliably when used with a second barricade device. It definitely can provide increased security, but not in an imminent emergency and not as the only doorstop device used.
M**A
I N U T I L E ! I N U T I L E! I N U T I L E ! 1 ora di tentativi per posizionarlo in modo efficace. Seguite le istruzioni alla lettera, utilizzati gli spessori aggiuntivi nella scatola, visti e rivisti video esplicativi. Non serve assolutamente a nulla, non si posiziona in maniera stabile e SE APPARENTEMENTE SEMBRA STABILE, con una spinta poco più forte si sposta o addirittura si sgancia da solo con un balzo indietro. La porta su cui abbiamo provato ad utilizzarlo aveva le caratteristiche utili descritte nelle indicazioni, il pavimento era un normalissimo pavimento a piastrelle. NON FUNZIONA!!!
S**.
May not be applicable in every door configuration, but device is effective for the most likely use scenario, especially hotel room doors, or front doors with simple doorsill to floor relationship.
S**Y
Works a treat. I wasn't expecting it to be so solid. But it didn't move a millimeter, stuck like glue to the floor! The door flexed and bent a little, and I think the hinges would be ripped out of the door frame before this gave out. Worth every penny for the safety and security of your family and home. Easy to fit, only takes a few seconds. I am very impressed!
M**E
Bonjour, Objet utilisé lors d’un séjour à l’hôtel. Très grande facilité à mettre en place et très efficace. Robuste dans sa fabrication. Les différentes cales en caoutchouc livrées avec le bloc porte doivent être utilisées avant le placement de celui-ci. Ne pas oublier ce détail sous peine de faire remonter la porte dans l’encadrement et au pire la coincer en fermeture. L’objet a été utilisé sur un sol stratifié et le maintien est parfait et ne glisse pas grâce a l’embase recouvert d’un caoutchouc. Ne pas mettre sur un tapis.
V**3
Lo recomiendo
Trustpilot
2 months ago
1 month ago