---
product_id: 253382236
title: "PRIME-LINE Defender Security U 10827 Door Reinforcement Lock – Add Extra, High Security to your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction (Satin Nickel Anodized Finish)"
brand: "prime-line"
price: "S/.285"
currency: PEN
in_stock: true
url: https://www.desertcart.pe/products/253382236-prime-line-defender-security-u-10827-door-reinforcement-lock-add
store_origin: PE
region: Peru
---

# Child-safe, tamper-resistant spring lock 3-inch hardened screws included 800 lbs force resistance PRIME-LINE Defender Security U 10827 Door Reinforcement Lock – Add Extra, High Security to your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction (Satin Nickel Anodized Finish)

**Brand:** prime-line
**Price:** S/.285
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock down your peace of mind with PRIME-LINE Defender!

## Quick Answers

- **What is this?** PRIME-LINE Defender Security U 10827 Door Reinforcement Lock – Add Extra, High Security to your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction (Satin Nickel Anodized Finish) by prime-line
- **How much does it cost?** S/.285 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/253382236-prime-line-defender-security-u-10827-door-reinforcement-lock-add)

## 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

- • **Universal Fit:** Designed for any swing-in door thickness, boosting your home’s defense instantly.
- • **Lock-Picking Proof:** Advanced tamper-resistant mechanism protects against lock bumping and picking.
- • **Unmatched Strength:** Withstands up to 800 lbs of force to stop break-ins cold.
- • **Family-First Safety:** Spring-loaded, child-safe design keeps little hands out and intruders locked out.
- • **Swift & Simple Setup:** Install in minutes with included 3” hardened screws—security made effortless.

## Overview

The PRIME-LINE Defender Security U 10827 is a satin nickel anodized aluminum door reinforcement lock engineered to withstand 800 lbs of force. Featuring a child-safe, tamper-resistant spring-loaded design and easy installation with included 3” hardened screws, it enhances security on any swing-in door, preventing unauthorized entry and lock tampering.

## Description

Full description not available

## Features

- KEEP YOUR HOME SAFE – Designed to withstand 800 lbs. of force, this U 10827 satin nickel finish door reinforcement lock helps to prevent doors from being kicked in, increasing your home security and keeping you and your family safe!
- EASY INSTALLATION – The included 3” hardened screws make installation a breeze – extra security and peace of mind can be achieved in just minutes!
- ADDITIONAL HOME SECURITY - Use this high security door reinforcement lock for additional home security on any swing-in door of any door thickness. It helps to ensure any door cannot be opened from the outside.
- CHILD-SAFE AND TAMPER-RESISTANT – This door reinforcement lock has a spring-loaded design that is both child-safe and tamper-resistant. It can be installed higher on the door where your children can’t reach! Plus, not only can doors not be kicked in by intruders, it protects against lock picking and bumping while in the locked position.
- WATCH THE VIDEO ON THIS PAGE for installation tips and operating instructions.
- For all dimensional information please refer to the line art and compare to your needs before purchasing

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Prime-Line Products |
| Part number | U 10827 |
| Item Weight | 168 g |
| Product Dimensions | 6.35 x 3.51 x 7.62 cm; 167.83 g |
| Item model number | U 10827 |
| Size | 3 in. |
| Color | Satin Nickel |
| Style | Lock |
| Finish | Satin Nickel |
| Material | Aluminum |
| Shape | Rectangular |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Plug Profile | Door Mount |
| Special Features | Weather Resistant |
| Included components | 1 door lock |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** PRIME-LINE
- **Special features:** Weather Resistant
- **Lock type:** Deadbolt
- **Item dimensions L x W x H:** 6.4 x 3.5 x 7.6 centimeters
- **Material:** Aluminum

## Images

![PRIME-LINE Defender Security U 10827 Door Reinforcement Lock – Add Extra, High Security to your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction (Satin Nickel Anodized Finish) - Image 1](https://m.media-amazon.com/images/I/61qMtnKyOxL.jpg)

## Available Options

This product comes in different **Colour Name** options.

## Questions & Answers

**Q: Would the Fire Department have trouble entering a house with this lock in case of a fire?**
A: I have experience breaking doors.   I’ve put locks like this or better on my house knowing it will slow the fire dept down a bit but like others have said we have tools that will break even this.  A halligan tool in the right hands will get through this pretty quickly, however with a lot of noise and certainly will deter the average criminal. 800lbs is a good amount of force to withstand, I think a average 200lb fireman with a halligan tool is probably capable of 1000lbs Of force applied to a certain spot on the door.  If you put the lock high or low that will make breaking That more difficult.  But the hydraulic tools fireman carry go up to 5000lbs.

**Q: Does it only work when someone is inside?**
A: I installed this on my front door.  As others have said, you must be inside to lock it, and it cannot be locked or unlocked from the outside.  So you have no access to the door from the outside when the lock is in place.  I keep it locked all the time, even when I'm not home, because I go in and out through my back door.  For extra safety and strength, I installed two of them on my front door, one about chest high and one about two feet from the floor.  I did this because I have a glass panel on the top half of the door, so if a burglar breaks the window, the bottom blocker is out of reach.  As extra security for my back door, I installed a security door (like a screen door except it's heavy gauge metal with its own handle lock and deadbolt).This door blocker is extremely well-made (heavy metal) and is a fantastic product.  I highly recommend it.

**Q: do  the screws come with this, or if not, what size do I need to buy**
A: Yes screws come with this device don't use them they're garbage go buy yourself some good heavy duty three to four inch screws from the hardware store so you can get into the frame of the house not just a door frame it'll make this device a lot more sturdy

**Q: I bought this but cannot open it. Is mine defective or is there a trick to opening it?**
A: Sometimes you are right. I had one defective out of three I received. The spring was loaded improperly which made the latch always to be in the open. Or if I forced it, the spring would dislodge and make it difficult to even close. And once closed it would not open. Now if that is the case then you need replacement.  However, if you are trying to understand how it works, all you have to do is when the latch lodged in the recess, basically in its closed position, pull out as if you are navigating around the latch notch that stops it. So the idea is pull laterally first and then turn the latch around the notch. Hope that helps.

## Frequently Bought Together

- Prime-Line U 10827 Door Reinforcement Lock – Add Extra, High Security to your Home and Prevent Unauthorized Entry – 3 In. Stop, Aluminum Construction, Satin Nickel (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)
- Hinge Outlet Satin Nickel Wood Screws, Heavy-Duty Screws for Doors, Cabinets, Furniture & DIY Projects (9 x 3 Inch – 24 Pack)

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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-02-07*