---
product_id: 20019110
title: "Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack)"
brand: "prime-line"
price: "€ 23.87"
currency: EUR
in_stock: true
reviews_count: 10
category: "Prime Line"
url: https://www.desertcart.gr/products/20019110-prime-line-u-9551-stainless-steel-lock-and-door-reinforcement
store_origin: GR
region: Greece
---

# Fits 1-3/4" thick doors perfectly Anti-forced entry steel shield Pre-punched for quick install Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack)

**Brand:** prime-line
**Price:** € 23.87
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock down your peace of mind with style and strength!

## Quick Answers

- **What is this?** Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) by prime-line
- **How much does it cost?** € 23.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/20019110-prime-line-u-9551-stainless-steel-lock-and-door-reinforcement)

## 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

- • **Precision Fit:** Designed specifically for 1-3/4 inch thick doors with standard bore and backset dimensions.
- • **Sleek & Subtle:** Natural stainless finish blends with modern door hardware without bulk or fuss.
- • **Built to Endure:** Crafted from premium stainless steel for lasting, rust-resistant protection.
- • **Effortless Upgrade:** Includes all mounting hardware and pre-punched holes for a seamless DIY install.
- • **Fortify Your Frontline:** Reinforces the vulnerable latch area to stop break-ins before they start.

## Overview

The Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate is a robust security upgrade designed for 1-3/4 inch thick doors. Made from durable stainless steel, it reinforces the door’s latch area to prevent forced entry. Pre-punched for easy installation, it fits standard 2-1/8 inch bore holes with a 2-3/8 inch backset, making it an ideal choice for both metal and wood doors seeking enhanced protection without compromising aesthetics.

## Description

Product 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 features 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). From the Manufacturer This lock & door reinforcer is constructed of stainless steel and fits 1-3/4 in. thick doors. It features a recessed latch plate pocket for flush installation of hardware. This security device assists in preventing forced entry by reinforcing the weak spot of an entry door, and it can be used on both metal and wood doors. This item accommodates key-in knob locksets on doors that have 2-1/8 in. bore sizes with a backset of 2-3/8 in. The width of this door guard is 3-7/8 in. and it is 9-7/8 in. tall. These door reinforcers are easy to install and they are used by many. All installation fasteners are included with this item.

Review: good quality - really made a big difference on my garage
Review: Simple - It does its job well ,good thickness but doesnt interfere so its a win

## 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 |
|---------------|-------|
| ASIN | B000OFTIL8 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #17,132 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #20 in Door Lock Replacement Parts |
| Brand | PRIME-LINE |
| Color | Stainless Steel |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,109) |
| Date First Available | March 16, 2007 |
| Finish | Stainless Steel |
| Finish Type | Stainless Steel |
| Global Trade Identification Number | 00049793195517 |
| Included Components | Lock and Door Reinforcer |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 12.8 ounces |
| Item dimensions L x W x H | 3.88 x 1.75 x 9 inches |
| Item model number | U 9551 |
| Lock Type | Deadbolt |
| Manufacturer | Prime-Line Products |
| Material | Alloy Steel |
| Model Name | Door guard |
| Mounting Type | Door Mount |
| Number of Pieces | 1 |
| Part Number | U 9551 |
| Product Dimensions | 3.88 x 1.75 x 9 inches |
| Recommended Uses For Product | Reinforcing entry doors in residential and commercial buildings to prevent forced entry |
| Size | 1-3/4 in. |
| Special Feature | Anti-Forced Entry |
| Special Features | Anti-Forced Entry |
| Style | Modern |
| UPC | 049793195517 |
| Warranty Description | Goods are warranted against manufacturing defects for 1 year. |

## Product Details

- **Brand:** PRIME-LINE
- **Item dimensions L x W x H:** 3.88 x 1.75 x 9 inches
- **Lock Type:** Deadbolt
- **Material:** Alloy Steel
- **Special Feature:** Anti-Forced Entry

## Images

![Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) - Image 1](https://m.media-amazon.com/images/I/21tGgxPILKL.jpg)
![Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) - Image 2](https://m.media-amazon.com/images/I/315XADo4K4L.jpg)
![Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) - Image 3](https://m.media-amazon.com/images/I/31N3EjNzSpL.jpg)
![Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) - Image 4](https://m.media-amazon.com/images/I/41Bangt9AgL.jpg)
![Prime-Line U 9551 Stainless Steel Lock and Door Reinforcement Plate for 1-3/4 In. Thick Doors, Stainless Steel Finish (Single Pack) - Image 5](https://m.media-amazon.com/images/I/51XtMzs6xqL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ good quality
*by R***S on December 16, 2025*

really made a big difference on my garage

### ⭐⭐⭐⭐⭐ Simple
*by M***Y on September 6, 2025*

It does its job well ,good thickness but doesnt interfere so its a win

### ⭐⭐⭐⭐⭐ Solid
*by S***O on December 10, 2025*

This worked exactly how I planned

## 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 Greece*
*Store origin: GR*
*Last updated: 2026-01-29*