---
product_id: 383193097
title: "PRIME-LINE U 9551 Door Guard Add Extra Security to Your Home, Helps Prevent Forced Entry, Stainless Steel, 1-3/4 in"
brand: "prime-line"
price: "$2386"
currency: MXN
in_stock: true
url: https://www.desertcart.mx/products/383193097-prime-line-u-9551-door-guard-add-extra-security-to
store_origin: MX
region: Mexico
---

# Reinforces door latch area Easy, pre-punched installation Durable stainless steel build PRIME-LINE U 9551 Door Guard Add Extra Security to Your Home, Helps Prevent Forced Entry, Stainless Steel, 1-3/4 in

**Brand:** prime-line
**Price:** $2386
**Availability:** ✅ In Stock

## Summary

> 🛡️ Lock down your peace of mind with sleek, steel-strong security!

## Quick Answers

- **What is this?** PRIME-LINE U 9551 Door Guard Add Extra Security to Your Home, Helps Prevent Forced Entry, Stainless Steel, 1-3/4 in by prime-line
- **How much does it cost?** $2386 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/383193097-prime-line-u-9551-door-guard-add-extra-security-to)

## 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

- • **Swift Setup:** Pre-punched design with included hardware for hassle-free installation
- • **Built to Endure:** Premium stainless steel ensures long-lasting security and sleek modern finish
- • **Invisible Guardian:** Non-recessed profile maintains door aesthetics while boosting protection
- • **Fortify Your Frontline:** Reinforces the vulnerable latch zone to prevent forced entry
- • **Universal Fit for 1-3/4" Doors:** Precisely engineered for standard door thickness and bore dimensions

## Overview

The PRIME-LINE U 9551 Door Guard is a stainless steel lock reinforcer designed to enhance home security by strengthening the door's latch area. It fits standard 1-3/4 inch thick doors with 2-1/8 inch bore holes and 2-3/8 inch backsets. Featuring a durable, corrosion-resistant alloy steel construction and a non-recessed, pre-punched design, it offers quick installation with included hardware, making it an essential upgrade for preventing forced entry while maintaining a modern door appearance.

## Description

Defender Security U 9551 Stainless Steel Lock and Door Reinforcer assists in preventing forced entry by reinforcing the weak spot of an entry door. It can be used to reinforce and repair both metal and wood doors. Made of solid brass construction, the lock reinforcer plate comes finished in brass. All the necessary mounting hardware is included for a quick and easy installation. The lock reinforcement plate is pre-punched for mounting. The reinforcer is designed for 1-3/8 inch thick doors that have mortise or drive-in latches. It featuress one 2-1/8 inch bore with a 2-3/8 inch backset. The door reinforcer is recessed. Please refer to the line art drawing for dimensions and compare to your needs before purchasing (Not Universal).

## Features

- ADDED SECURITY – Prevent forced entry by reinforcing the weak spot of your door with the non-recessed door lock reinforcer; use to reinforce and repair both metal, fiberglass and wood doors when the latch area has been compromised
- BUILT TO LAST – Made of stainless steel, the door lock reinforcement plate comes in a natural finish to fit over a single bore hole on your door
- EASY INSTALLATION – All the necessary mounting hardware is included with the lock reinforcement plate for a quick and easy installation; the door reinforcer plate is pre-punched for mounting. Remove the protective film after installation
- DIMENSIONS – The door lock reinforcement plate is designed for 1-3/4 inch thick doors only that have a 2-1/8 inch bore hole through the door, with a 2-3/8 inch backset from the edge of the door to the center of the bore holes
- NOTE – Make sure to dry fit the 3-7/8 inch wide by 9 inch tall with a 0.03 inch thickness door lock reinforcer before permanently installing and refer to the line art drawing and compare with your needs before purchasing
- Used to reinforce and repair doors to aide in preventing forced entry
- Fits 1-3/4 in. thick doors, 2-1/8 in. bores, 2-3/8 in. backset, 3-7/8 in. width x 9 in. height
- Stainless steel

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Prime-Line Products |
| Part Number | U 9551 |
| Product Dimensions | 9.84 x 4.45 x 22.86 cm; 362.87 g |
| Item model number | U 9551 |
| Size | 1-3/4 in. |
| Colour | Stainless Steel (If the Intention Was to Describe Material, Not Color) |
| Style | Modern |
| Finish | Stainless Steel |
| Material | Alloy Steel |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Plug profile | Door Mount |
| Included Components | Prime-Line Products U 9551 Lock & Door Reinforcer, 2-1/8 in. x 2-3/8 in. x 1-3/4 in., Stainless Steel, Recessed |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 363 g |

## Product Details

- **Brand:** Prime-Line
- **Item dimensions L x W x H:** 9.8 x 4.4 x 22.9 centimetres
- **Material:** Alloy Steel
- **Style:** Modern
- **Colour:** Stainless Steel (If the Intention Was to Describe Material, Not Color)

## Images

![PRIME-LINE U 9551 Door Guard Add Extra Security to Your Home, Helps Prevent Forced Entry, Stainless Steel, 1-3/4 in - Image 1](https://m.media-amazon.com/images/I/51XtMzs6xqL.jpg)
![PRIME-LINE U 9551 Door Guard Add Extra Security to Your Home, Helps Prevent Forced Entry, Stainless Steel, 1-3/4 in - Image 2](https://m.media-amazon.com/images/I/61pBpl6nweL.jpg)
![PRIME-LINE U 9551 Door Guard Add Extra Security to Your Home, Helps Prevent Forced Entry, Stainless Steel, 1-3/4 in - Image 3](https://m.media-amazon.com/images/I/61UJR6yOy5L.jpg)
![PRIME-LINE U 9551 Door Guard Add Extra Security to Your Home, Helps Prevent Forced Entry, Stainless Steel, 1-3/4 in - Image 4](https://m.media-amazon.com/images/I/71UrKVyEOrL.jpg)

## Frequently Bought Together

- Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack)
- Prime-Line U 9476 Maximum Security Latch Strike, 1-1/4 In. x 7-7/8 In., Steel, Chrome Plated (Single Pack)
- Prime-Line U 9585 Stainless Steel Lock and Door Reinforcement Plate for 1-3/8 In. Thick Doors, Stainless Steel Finish (Single Pack)

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-02-08*