---
product_id: 44840893
title: "Marks Lock 21 Brass Series UNILOCK 21AC Mortise Lock for Security Door and Storm Door (Right Handed)"
brand: "marks usa"
price: "1065.83 DT"
currency: TND
in_stock: true
reviews_count: 5
url: https://www.desertcart.tn/products/44840893-marks-lock-21-brass-series-unilock-21ac-mortise-lock-security
store_origin: TN
region: Tunisia
---

# Easy installation High-security design Durable brass construction Marks Lock 21 Brass Series UNILOCK 21AC Mortise Lock for Security Door and Storm Door (Right Handed)

**Brand:** marks usa
**Price:** 1065.83 DT
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in peace of mind with style!

## Quick Answers

- **What is this?** Marks Lock 21 Brass Series UNILOCK 21AC Mortise Lock for Security Door and Storm Door (Right Handed) by marks usa
- **How much does it cost?** 1065.83 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/44840893-marks-lock-21-brass-series-unilock-21ac-mortise-lock-security)

## Best For

- marks usa enthusiasts

## Why This Product

- Trusted marks usa brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Weather-Resistant:** Built to withstand the elements, perfect for storm doors.
- • **Sleek Brass Finish:** A stylish addition that complements any door design.
- • **Unmatched Security:** Elevate your door's defense with the Marks Lock 21AC.
- • **Right-Handed Convenience:** Designed specifically for right-handed doors for effortless use.
- • **User-Friendly Installation:** Get secure in minutes with straightforward setup.

## Overview

The Marks Lock 21 Brass Series UNILOCK 21AC Mortise Lock is engineered for security doors and storm doors, featuring a robust brass construction and designed specifically for right-handed applications. Its weather-resistant properties ensure durability, making it an ideal choice for both residential and commercial settings.

## Description

Marks Lock 21 Brass Series UNILOCK 21AC Mortise Lock for Security Door and Storm Door (Right Handed)

## Features

- Marks Lock 21 Series UniLock 21AC Mortise Lock for Security Door and Storm Door

## Images

![Marks Lock 21 Brass Series UNILOCK 21AC Mortise Lock for Security Door and Storm Door (Right Handed) - Image 1](https://m.media-amazon.com/images/I/41N8GHRhalL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Perfect Fit
  

*by S***R on Reviewed in the United States 🇺🇸 on March 3, 2022*

I liked the easy installation

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Looks great and installed easily.
  

*by A***N on Reviewed in the United States 🇺🇸 on December 24, 2021*

Will not lock with the key because the key mechanism is not flush with the body of the lock as the original was.

### ⭐⭐ 2.0 out of 5 stars







  
  
    one of the mounting screws had glue on threads, took half hour to fight + half hour to clean
  

*by W***H on Reviewed in the United States 🇺🇸 on August 29, 2019*

ordered 2, front door and back. installation at front door fairly easy except edge plate was a bit longer than the old one and I had to cut the door a bit (metal storm door). installation on back door was a bear. Tried multiple times to screw in mounting screw but it would not go. "What am I doing wrong?" I wondered. finally removed everything. Tried screwing the screw into the receiver with no other hardware in the way. It would not go! Closer examination showed something in the threads (straight out of the sealed plastic bag from the factory). Took a pocket knife to the threads to clean it, but it wouldn't come off. 16 power magnification revealed what looked like Liquid Nails or other adhesive. Used a wire brush over and over for 30 minutes, finally had it clean. Installation was then easy. (I confess I had a few words to say during installation.) Installation took 2.5 hours including door modifications, fighting, cussing, screw cleaning, and installation. Should have been 30 minutes total for both.

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**Shop now:** [https://www.desertcart.tn/products/44840893-marks-lock-21-brass-series-unilock-21ac-mortise-lock-security](https://www.desertcart.tn/products/44840893-marks-lock-21-brass-series-unilock-21ac-mortise-lock-security)

---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-02*