---
product_id: 298944462
title: "Defender Security U 10304 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction with a Satin Nickel Finish"
brand: "prime-line"
price: "S$65"
currency: SGD
in_stock: false
url: https://www.desertcart.sg/products/298944462-defender-security-u-10304-chain-door-guard-door-chain-lock
store_origin: SG
region: Singapore
---

# 6-inch, 8-link welded steel chain Quick & easy installation with included fasteners Solid extruded brass with satin nickel finish Defender Security U 10304 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction with a Satin Nickel Finish

**Brand:** prime-line
**Price:** S$65
**Availability:** ❌ Out of Stock

## Summary

> 🛡️ Lock in safety, unlock peace of mind.

## Quick Answers

- **What is this?** Defender Security U 10304 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction with a Satin Nickel Finish by prime-line
- **How much does it cost?** S$65 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/298944462-defender-security-u-10304-chain-door-guard-door-chain-lock)

## 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

- • **Built to Last:** Durable extruded brass and welded steel chain ensure long-term protection.
- • **Versatile Fit:** Fits multiple door types and can be mounted over or beside door casings.
- • **Effortless Setup:** All hardware included for a fast, hassle-free installation.
- • **Child-Safe Peace of Mind:** Install out of reach to prevent kids from opening doors unsupervised.
- • **Secure Your Space with Style:** Sleek satin nickel finish blends modern design with robust security.

## Overview

The Defender Security U 10304 Chain Door Guard is a premium door security device crafted from solid extruded brass with a satin nickel finish. Featuring a 6-inch, 8-link welded steel chain, it allows safe door ventilation and viewing while preventing unauthorized entry. Designed for easy installation with included hardware, it also doubles as a child-safe lock by being mountable out of children's reach. Compatible with various door types, this durable chain guard offers reliable, stylish protection for home or office.

## Description

This chain door guard is constructed of extruded brass and comes in a satin nickel plated finish. It features a 6-inch long, 8-link welded steel chain and all installation fasteners necessary for complete install. When this chain door guard is fully assembled and engaged from base to keeper, the chain will extend to 4-5/8 inches. To determine the maximum distance it secures a door for safe viewing or ventilation, subtract the thickness of the door from 4-5/8 inches (approx. 3-inches). It can be used on a variety of door types and over, or beside door casing. The smaller chain-holder base measures 3/4 inches wide, and the wider chain lock keeper measures 3-5/16 long; both with a height of 2-inches. This chain door guard also works great as a child-safe security device which can help prevent little ones from fully opening doors and entering or exiting into dangerous areas. See model number U 10305 for classic bronze, U 9909 for satin chrome, S 4298 for chrome, U 9913 antique brass and U 9907 for brass.

## Features

- SECURITY LOCKING DEVICE –This U 10304 Chain Door Guard is a security locking device for doors, allowing a door to be slightly opened to allow safe viewing and ventilation.
- CHILD-SAFE SECURITY DEVICE – This door chain lock can also be installed out of reach of children so they cannot open the door by themselves, providing additional child-safe door security.
- EASY INSTALLATION - Installation is quick and easy – additional security for your home or office doors are within reach! Installation fasteners are included.
- DURABLE CONSTRUCTION – This chain door guard is constructed of extruded brass with a satin nickel plated finish and a 6”, 8-link welded steel chain. It’s strong and durable and sure to last.
- PRODUCT INFO – The 3-5/16” U 10304 Chain Door Guard can be used on a variety of door types and can be placed over or beside door casing. It features a 6-inch long, 8-link welded steel chain and all installation fasteners necessary for complete install.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Prime-Line |
| Special Feature | Child-Safe Viewing and Ventilation |
| Item dimensions L x W x H | 8.4 x 1.6 x 5.1 Centimeters |
| Material | Alloy Steel |
| Colour | satin nickel |
| Number of Pieces | 1 |
| Finish Type | Satin Nickel |
| Included Components | Hardware;Door Knobs & Lock Sets;door-chains |
| Control Method | Touch |
| UPC | 049793103048 |
| Model Name | U 10304 |
| Global Trade Identification Number | 00049793103048 |
| Manufacturer | Prime-Line Products (Home Improvement) |
| Country of Origin | USA |
| Item model number | U 10304 |
| Product Dimensions | 8.41 x 1.59 x 5.08 cm; 50 g |
| ASIN | B003VWPKQ8 |

## Product Details

- **Brand:** Prime-Line
- **Special Feature:** Child-Safe Viewing and Ventilation
- **Item dimensions L x W x H:** 8.4 x 1.6 x 5.1 Centimeters
- **Material:** Alloy Steel
- **Colour:** satin nickel

## Images

![Defender Security U 10304 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction with a Satin Nickel Finish - Image 1](https://m.media-amazon.com/images/I/61yi53GbYHL.jpg)
![Defender Security U 10304 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction with a Satin Nickel Finish - Image 2](https://m.media-amazon.com/images/I/51yCx600o7S.jpg)
![Defender Security U 10304 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction with a Satin Nickel Finish - Image 3](https://m.media-amazon.com/images/I/61dVarMBStL.jpg)

## Frequently Bought Together

- Prime-Line U 10304 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16 In., Solid Brass Construction with a Satin Nickel Finish (Single Pack)
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**Shop now:** [https://www.desertcart.sg/products/298944462-defender-security-u-10304-chain-door-guard-door-chain-lock](https://www.desertcart.sg/products/298944462-defender-security-u-10304-chain-door-guard-door-chain-lock)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-01-23*