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Bigamart
Price
$52.80
Home/DIY & Tools/Hardware/Door Hardware & Locks/Door Closers
DoorJammer Portable Door Lock Brace for Home Security and Personal Protection (DJ4LD - DoorJammer (Lockdown)) — image 1
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DoorJammer Portable Door Lock Brace for Home Security and Personal Protection (DJ4LD - DoorJammer (Lockdown))

★★★★★
$52.80
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About this item
  • Only for Inswinging Doors with 3mm / 1/4" Clearance – DoorJammer Lockdown is the police accredited and award-winning portable, industrial strength door security device that prevents unwanted entry in seconds. It takes just moments to fit in the gap under almost any inswinging door without the need for tools or any permanent modifications. The DJ4’s patented design uses displacement of force to barricade the door against an attempt at forced entry.
  • Tried & Tested – At twice the size (a height of 192mm/7.56”), Lockdown is the heavy-duty big brother of the award-winning original travel safety device DoorJammer.
  • Designed for Commercial Use – Created for emergency deployment in public buildings, schools, offices and hotels, this is the last word in portable stopping power. Designed for use during emergency Lockdown situations.
  • Quick Setup & Release – Takes only seconds to install and remove. No tools are required to implement this revolutionary portable security device. In case of emergency, the unique design enables a quick-release function that 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 laminated floors when outside pressure is exerted on the door. The Lockdown must be installed on a flat surface.
  • CANNOT BE USED ON DOORS WITH WEATHER SEALS OR PROTECTIVE STRIPS – Many exterior doors will have a riser, flashing, weather stripping or sealing etc. that will impede the DoorJammer Lockdown or not allow it to fit properly. You will need to observe the condition of your exterior door if buying for that purpose
  • The Complete Package – includes DoorJammer Lockdown DJ4 device, plush carry bag, spacer set for fit customization, and easy-to-follow instruction manual.
Product details
Brand
DoorJammer
Manufacturer
Penn-Elcom
Colour
Dj4ld - Doorjammer Lockdown (Heavyweight)
Size
Lockdown

Customer reviews

What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
★★★★★
Excellent
4.5 average rating
See all reviews →
S
Sigalit
🇮🇱 · January 2026
★★★★★

I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
🇦🇺 · November 2025
★★★★★

The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

Showing 1–2 of 10 reviews

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