---
product_id: 317685284
title: "Defender Security U 11442 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction"
brand: "defender security"
price: "21296 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/317685284-defender-security-u-11442-door-reinforcement-lock-add-extra-high
store_origin: IS
region: Iceland
---

# Defender Security U 11442 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction

**Brand:** defender security
**Price:** 21296 kr
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Defender Security U 11442 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction by defender security
- **How much does it cost?** 21296 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/317685284-defender-security-u-11442-door-reinforcement-lock-add-extra-high)

## Best For

- defender security enthusiasts

## Why This Product

- Trusted defender security brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Defender Security U 11442 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction

## Features

- About this item     KEEP YOUR HOME SAFE – Designed to withstand 800 lbs. of force, this U 11442 brass finish door reinforcement lock helps to prevent doors from being kicked in, increasing your home security and keeping you and your family safe!     EASY INSTALLATION – The included 3” hardened screws make installation a breeze – extra security and peace of mind can be achieved in just minutes. Length is 2 to 0.19 inch. Width is 1 to 0.38 inch.     ADDITIONAL HOME SECURITY - Use this high security door reinforcement lock for additional home security on any swing-in door of any door thickness. It helps to ensure any door cannot be opened from the outside.     CHILD-SAFE AND TAMPER-RESISTANT – This Defender Security door blocker by Prime-Line has a spring-loaded design that is both child-safe and tamper-resistant. It can be installed higher on the door where your children can’t reach! Plus, not only can doors not be kicked in by intruders, it protects against lock picking and bumping while in the locked position.     WATCH THE VIDEO ON THIS PAGE for installation tips and operating instructions.    ›See more product details

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | PRIME-LINE |
| Special Feature | Weather Resistant |
| Lock Type | Door Reinforcement Lock |
| Item dimensions L x W x H | 1.55 x 3.75 x 6.35 inches |
| Material | Aluminum, Brass |
| Style | Modern |
| Color | Polished Brass |
| Number of Pieces | 1 |
| Finish Type | Brass |
| Included Components | Lock, Mounting hardware |
| Item Weight | 0.19 Kilograms |
| Control Method | Touch |
| UPC | 049793714428 |
| Model Name | Door Reinforcement Lock |
| Global Trade Identification Number | 00049793714428 |
| Manufacturer | Prime-Line Products |
| Part Number | U 11442 |
| Item Weight | 6.5 ounces |
| Product Dimensions | 1.55 x 3.75 x 6.35 inches |
| Item model number | U 11442 |
| Size | 3 in. |
| Finish | Brass |
| Item Package Quantity | 1 |
| Special Features | Weather Resistant |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** PRIME-LINE
- **Special Feature:** Weather Resistant
- **Lock Type:** Door Reinforcement Lock
- **Item dimensions L x W x H:** 1.55 x 3.75 x 6.35 inches
- **Material:** Aluminum, Brass

## Images

![Defender Security U 11442 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction - Image 1](https://m.media-amazon.com/images/I/61zia7gLPKL.jpg)
![Defender Security U 11442 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction - Image 2](https://m.media-amazon.com/images/I/81ugBK+lWtL.jpg)
![Defender Security U 11442 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction - Image 3](https://m.media-amazon.com/images/I/81d8Oql0uHL.jpg)
![Defender Security U 11442 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction - Image 4](https://m.media-amazon.com/images/I/81+uQ5ApHDL.jpg)
![Defender Security U 11442 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction - Image 5](https://m.media-amazon.com/images/I/61aO2RR0++L.jpg)

## Questions & Answers

**Q: What is the actual width of the mounting plate?  I have a two inch mounting surface, unless I push the plate behind the my door’s weather stripping.**
A: 1 1/2"W.

**Q: How wide of a gap do you need between the door and jam without mortising out?**
A: 3/32 in. is just about right.  That part that goes between the frame and the door is a little over 1/16 in. (5/64 in.)

**Q: Where is this item made? Thx.**
A: Brass

**Q: Would this be effective on french doors?**
A: If one of the french doors can be anchored into place (locked with a long, thick metal rod that goes into the threshold, door frame and foundation, and another rod at the top of the french door that slips into the doorframe and the stud that forms part of the structural wall above your doorframe), then yes.

## Frequently Bought Together

- Prime-Line U 11442 Door Reinforcement Lock – Add Extra, High Security to your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Polished Brass (Single Pack)
- Prime-Line U 9480 Door Strike, for Use with 5-1/2” and 6” Hole Spacing On Dead Latch and Deadbolt, Steel, Brass (Single Pack)
- Hinge Outlet Wood Screws, Heavy-Duty Screws for Doors, Cabinets, Furniture & DIY Projects (Polished Brass,9 X 3 Inch, 24 Pack)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.is/products/317685284-defender-security-u-11442-door-reinforcement-lock-add-extra-high](https://www.desertcart.is/products/317685284-defender-security-u-11442-door-reinforcement-lock-add-extra-high)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-11*