---
product_id: 125003633
title: "MARKS KNOB Assembly KIT for 21AC Mortise Lock for Security Storm Door"
brand: "marks"
price: "20508 som"
currency: KGS
in_stock: true
reviews_count: 8
url: https://www.desertcart.kg/products/125003633-marks-knob-assembly-kit-for-21ac-mortise-lock-for-security
store_origin: KG
region: Kyrgyzstan
---

# Secure Key Lock Easy Installation Durable Brass & Iron MARKS KNOB Assembly KIT for 21AC Mortise Lock for Security Storm Door

**Brand:** marks
**Price:** 20508 som
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in style and security—because your door deserves the best.

## Quick Answers

- **What is this?** MARKS KNOB Assembly KIT for 21AC Mortise Lock for Security Storm Door by marks
- **How much does it cost?** 20508 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/125003633-marks-knob-assembly-kit-for-21ac-mortise-lock-for-security)

## Best For

- marks enthusiasts

## Why This Product

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

## Key Features

- • **Ambidextrous Design:** Perfectly balanced for left or right-handed use, fitting seamlessly on any storm door.
- • **Compact & Sturdy Profile:** 1.75-inch projection ensures a sleek look without compromising on grip or toughness.
- • **Complete Kit Convenience:** Includes all 6 essential pieces for a flawless, professional-grade assembly.
- • **Premium Brass & Iron Build:** Engineered for strength and longevity, combining classic style with modern durability.
- • **Effortless Security Upgrade:** Install your 21AC mortise lock knob in minutes—no hassle, no fuss.

## Overview

The MARKS Knob Assembly Kit for 21AC Mortise Lock is a robust, easy-to-install solution crafted from premium brass and iron. Designed for security storm doors, it features an ambidextrous handle, a compact 1.75-inch projection, and includes all necessary components for a seamless upgrade. Durable, stylish, and built to last, this kit ensures your entryway stands out with both function and flair.

## Description

MARKS KNOB Assembly KIT for 21AC Mortise Lock for Security Storm Door

## Features

- MARKS KNOB ASSEMBLY KIT FOR 21AC MORTISE LOCK FOR SECURITY STORM DOOR

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Brass, Iron |
| Brand | MARKS |
| Color | Brass |
| Exterior Finish | Brass, Iron |
| Special Feature | Easy to Install, Sturdy |
| Included Components | Knob |
| Item Weight | 1.5 Pounds |
| Metal Type | Brass, Iron |
| Handle Material | Brass |
| Hand Orientation | Ambidextrous |
| Projection Distance | 1.75 Inches |
| Unit Count | 1 Count |
| Manufacturer | MARKS |
| Item Depth | 1.75 inches |
| Handle Attachment Mechanism | Through-the-Door |
| Lock Type | Key Lock |
| UPC | 084015016270 |
| Part Number | K21ACX |
| Item Weight | 1.5 pounds |
| Is Discontinued By Manufacturer | No |
| Finish | Zinc |
| Item Package Quantity | 1 |
| Number Of Pieces | 6 |
| Special Features | Easy to Install, Sturdy |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Brass, Iron
- **Brand:** MARKS
- **Color:** Brass
- **Exterior Finish:** Brass, Iron
- **Special Feature:** Easy to Install, Sturdy

## Images

![MARKS KNOB Assembly KIT for 21AC Mortise Lock for Security Storm Door - Image 1](https://m.media-amazon.com/images/I/51zGafgnccL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect replacement
*by L***H on May 12, 2024*

The knob assembly was a perfect match for mine that was broken and easy to replace. Works great.

### ⭐⭐⭐⭐⭐ Marks Knob replacement is exact part!
*by M***D on October 23, 2024*

This is the replacement part that Marks locks recommended. It is the exact replacement needed. Smooth transaction. Thanks!

### ⭐⭐⭐⭐ Great product.
*by A***C on August 19, 2021*

I used this product to replace the broken knob on my security door. This product was easy to install and performed exactly like the original.

## Frequently Bought Together

- MARKS KNOB Assembly KIT for 21AC Mortise Lock for Security Storm Door
- Marks 22 KNOB Rose KIT Brass - K22 3

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**Shop now:** [https://www.desertcart.kg/products/125003633-marks-knob-assembly-kit-for-21ac-mortise-lock-for-security](https://www.desertcart.kg/products/125003633-marks-knob-assembly-kit-for-21ac-mortise-lock-for-security)

---

*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-03-11*