---
product_id: 54143327
title: "Defender Security U 11325 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack)"
brand: "prime-line"
price: "A$83"
currency: AUD
in_stock: true
reviews_count: 8
category: "Prime Line"
url: https://www.desertcart.com.au/products/54143327-defender-security-u-11325-door-reinforcement-lock-add-extra-high
store_origin: AU
region: Australia
---

# Aluminum construction & fasteners 3-inch door stop for secure reinforcement 800 lbs. force resistance Defender Security U 11325 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack)

**Brand:** prime-line
**Price:** A$83
**Availability:** ✅ In Stock

## Summary

> 🛡️ Lock in peace of mind with Defender’s sleek, unbreakable shield!

## Quick Answers

- **What is this?** Defender Security U 11325 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack) by prime-line
- **How much does it cost?** A$83 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/54143327-defender-security-u-11325-door-reinforcement-lock-add-extra-high)

## Best For

- prime-line enthusiasts

## Why This Product

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

## Key Features

- • **Unmatched Strength:** Engineered to withstand up to 800 lbs. of force, this lock is your home's first line of defense.
- • **Sleek & Durable Design:** Brushed chrome aluminum build offers modern aesthetics with long-lasting durability.
- • **Effortless Installation:** Includes all fasteners and a straightforward design for quick, hassle-free setup.
- • **Child-Safe & Tamper-Proof:** Spring-loaded mechanism installs high for child safety and resists lock picking or bumping.
- • **Universal Fit for Any Door:** Compatible with any swinging door thickness, ensuring seamless security upgrades.

## Overview

The Defender Security U 11325 Door Reinforcement Lock is a high-strength, tamper-resistant deadbolt designed to add an extra layer of security to any swinging door. Crafted from durable aluminum with a brushed chrome finish, it withstands up to 800 lbs. of force and features a child-safe, spring-loaded design. Easy to install with included fasteners, it’s the perfect modern upgrade for millennial professionals seeking reliable home protection without compromising style.

## Description

Shop Defender Security U 11325 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack). Free delivery on eligible orders of £20 or more.

Review: Perfect!! - Easy to install, very secure! Need a lock for my bedroom and with a uneven door frame this was the perfect choice.
Review: Works extremely well - Purchased to keep the kids out of our bedroom when, well, you know what might be happening... Replaced the screws per other reviews which advised to go with a better set. The door lock looks appealing and is very sturdy. I just wish it had a little better advice on positioning as it's hard not to install with too much wiggle (ie. door opens a little before stopping). Also installed a second set on the family bathroom. A clear advantage of the product is that one cannot lock by accident from outside. However, it would be impossible to override it if the person becomes incapacitated. So maybe not ideal for older people.

## Features

- KEEP YOUR HOME SAFE - Designed to withstand 800 lbs. This U 11325 door reinforcement lock with brushed chrome finish helps prevent doors from entering, increasing the security of your home and keeping you and your family safe
- EXTRA HOME SECURITY - Use this high security door reinforcement lock for added security at home on any swinging door of any thickness. It helps ensure that each door cannot be opened from the outside.
- CHILD SAFE & TAMPERPROOF - The spring loaded design can be installed at a higher level to ensure it is child safe. Plus, this tamper evident door latch protects against door entry, lock picking and bumps.
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XD79NX3 |
| Best Sellers Rank | 39,983 in DIY & Tools ( See Top 100 in DIY & Tools ) 81 in Lock Replacement Parts |
| Brand | Prime-Line |
| Colour | Brushed Chrome |
| Control Method | Push Button |
| Country of Origin | China |
| Customer Reviews | 4.7 out of 5 stars 27,358 Reviews |
| Finish | Brushed |
| Global Trade Identification Number | 00049793113252 |
| Included Components | Reinforcement lock, fasteners |
| Item Dimensions | 38 x 97 x 164 millimetres |
| Item Type Name | Door Reinforcement Lock |
| Item Weight | 168 g |
| Item dimensions L x W x H | 38 x 97 x 164 millimetres |
| Lock Type | Deadbolt |
| Lock type | Deadbolt |
| Manufacturer | Prime-Line |
| Material | Metal |
| Model Number | U 11325 |
| Recommended Uses For Product | Wohnbereich |
| Recommended uses for product | Wohnbereich |
| Shape | Form |
| Special Features | Anti-Theft |
| Special feature | Anti-Theft |
| Style | Modern |
| UPC | 049793113252 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Prime-Line
- **Item dimensions L x W x H:** 38 x 97 x 164 millimetres
- **Lock type:** Deadbolt
- **Material:** Metal
- **Special feature:** Anti-Theft

## Images

![Defender Security U 11325 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack) - Image 1](https://m.media-amazon.com/images/I/51MUKkMtjaL.jpg)
![Defender Security U 11325 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack) - Image 2](https://m.media-amazon.com/images/I/51GNE0w3N7L.jpg)
![Defender Security U 11325 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack) - Image 3](https://m.media-amazon.com/images/I/61aO2RR0++L.jpg)
![Defender Security U 11325 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack) - Image 4](https://m.media-amazon.com/images/I/71InCEDUqwL.jpg)
![Defender Security U 11325 Door Reinforcement Lock – Add Extra, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack) - Image 5](https://m.media-amazon.com/images/I/71nO7L-G0VL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect!!
*by R***O on 21 February 2025*

Easy to install, very secure! Need a lock for my bedroom and with a uneven door frame this was the perfect choice.

### ⭐⭐⭐⭐⭐ Works extremely well
*by S***7 on 6 December 2025*

Purchased to keep the kids out of our bedroom when, well, you know what might be happening... Replaced the screws per other reviews which advised to go with a better set. The door lock looks appealing and is very sturdy. I just wish it had a little better advice on positioning as it's hard not to install with too much wiggle (ie. door opens a little before stopping). Also installed a second set on the family bathroom. A clear advantage of the product is that one cannot lock by accident from outside. However, it would be impossible to override it if the person becomes incapacitated. So maybe not ideal for older people.

### ⭐⭐⭐⭐⭐ Best lock ever
*by K***T on 16 December 2025*

Absolutely fantastic this lock one of the best I’ve come across, my home feels safe and secure and trust me no one is getting through my street door, best buy yet definitely recommend 🙌🏽💞🥰

## Frequently Bought Together

- Prime-Line U 11325 Door Reinforcement Lock – Add Extra, High Security to your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction, Brushed Chrome (Single Pack)
- Prime-Line U 10385 Door Strike, for Use with 5-1/2 In. and 6 In. Hole Spacing On Dead Latch and Deadbolt, Steel, Satin Nickel (Single Pack)

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**Shop now:** [https://www.desertcart.com.au/products/54143327-defender-security-u-11325-door-reinforcement-lock-add-extra-high](https://www.desertcart.com.au/products/54143327-defender-security-u-11325-door-reinforcement-lock-add-extra-high)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-26*