---
product_id: 141979531
title: "U 9909 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction and a Dull Chrome Finish (Single Pack)"
brand: "prime-line"
price: "191 kr"
currency: DKK
in_stock: true
url: https://www.desertcart.dk/products/141979531-u-9909-chain-door-guard-door-chain-lock-for-door
store_origin: DK
region: Denmark
---

# 6-inch welded steel chain Easy install with included fasteners Solid extruded brass build U 9909 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction and a Dull Chrome Finish (Single Pack)

**Brand:** prime-line
**Price:** 191 kr
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in peace of mind with style and strength!

## Quick Answers

- **What is this?** U 9909 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction and a Dull Chrome Finish (Single Pack) by prime-line
- **How much does it cost?** 191 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/141979531-u-9909-chain-door-guard-door-chain-lock-for-door)

## 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

- • **Hassle-Free Setup:** Includes all necessary fasteners for quick, tool-friendly installation—security upgrades made simple.
- • **Child-Safe Placement:** Install out of reach to prevent kids from unlocking, adding peace of mind for families.
- • **Durable Premium Materials:** Crafted from solid brass with a satin chrome finish and a robust 8-link steel chain for long-lasting protection.
- • **Universal Fit & Versatile:** Compact 3-5/16” size fits various door types and can be mounted over or beside door casings.
- • **Secure Ventilation Control:** Allows door to open slightly for safe viewing and airflow without compromising security.

## Overview

The Prime-Line U 9909 Chain Door Guard is a compact, durable door security device featuring a 6-inch, 8-link welded steel chain and solid extruded brass construction with a satin chrome finish. Designed for easy installation with included fasteners, it allows safe door ventilation while preventing unauthorized entry and child access, fitting a variety of door types for enhanced home or office security.

## Description

This U 9909 Chain Door Guard Lock is a security locking device for doors, allowing a door to be slightly opened to allow safe viewing and ventilation. This door lock can also be installed out of reach of children so they cannot open the door by themselves, providing additional child-safe door security. Installation is quick and easy with fasteners included, providing added security for your home or office doors. This door guard is constructed of extruded brass with a satin chrome finish and a 6 inch, 8-link welded steel chain. The 3-5/16 inch chain 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.

## Features

- SECURITY LOCKING DEVICE – This U 9909 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 dull chrome 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 9909 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 |
|---------------|-------|
| Manufacturer | Prime-Line Products (Home Improvement) |
| Part Number | U 9909 |
| Item Weight | 4.6 ounces |
| Product Dimensions | 3.31 x 0.63 x 2 inches |
| Item model number | U 9909 |
| Size | 3-15/16 in. |
| Color | Satin Chrome |
| Style | Standard |
| Finish | Chrome |
| Material | Steel |
| Item Package Quantity | 1 |
| Included Components | lock, keeper and fasteners |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Goods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse. |

## Images

![U 9909 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction and a Dull Chrome Finish (Single Pack) - Image 1](https://m.media-amazon.com/images/I/514XZaSrPfL.jpg)

## Available Options

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

## Questions & Answers

**Q: Do this work on doors with molding?**
A: Yes they do.  I used them on 4 different doors, all with a different kind of molding, and they work absolutely great!!  I'm very pleased with them.

**Q: Would the chain break if someone tried to forcefully enter through the door? (not talking about the screws just the chain)**
A: Yes.  My medium-sized dog tried to get through the door I 'secured' with this, and the anchor at the end of the chain  popped right off.

**Q: Has anyone installed this on a solid wood door? I’m afraid it might split the wood?**
A: Pre-drill the holes.  The quality of the chain was very weak though.

**Q: Instructions for installing door lock?**
A: Easy to install, you just need a screwdriver and it will not protect against strong pressure on the door!  Only if the children do not come out

## Frequently Bought Together

- Prime-Line U 9909 Chain Door Guard – Door Chain Lock for Door and Home Security, 3-5/16”, Solid Brass Construction and a Dull Chrome Finish (Single Pack)
- EverPlus Home Security Door Lock with 8 Screws, Childproof Door Reinforcement Lock with 3 Inch Stop Withstand 800 lbs for Inward Swinging Door,Upgrade Night Lock to Defend Your Home (Silver)

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**Shop now:** [https://www.desertcart.dk/products/141979531-u-9909-chain-door-guard-door-chain-lock-for-door](https://www.desertcart.dk/products/141979531-u-9909-chain-door-guard-door-chain-lock-for-door)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-05*