---
product_id: 78595563
title: "5420EC Set Your Own Combination Portable Lock Box with Adjustable Shackle, 6 Key Capacity"
brand: "master lock"
price: "€ 77.78"
currency: EUR
in_stock: true
reviews_count: 13
category: "Master Lock"
url: https://www.desertcart.pt/products/78595563-5420ec-set-your-own-combination-portable-lock-box-with-adjustable
store_origin: PT
region: Portugal
---

# 4-digit customizable combo lock Adjustable shackle fits multiple knob styles Weather-resistant with vinyl-coated shackle 5420EC Set Your Own Combination Portable Lock Box with Adjustable Shackle, 6 Key Capacity

**Brand:** master lock
**Price:** € 77.78
**Availability:** ✅ In Stock

## Summary

> 🔐 Secure your keys, unlock your freedom.

## Quick Answers

- **What is this?** 5420EC Set Your Own Combination Portable Lock Box with Adjustable Shackle, 6 Key Capacity by master lock
- **How much does it cost?** € 77.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/78595563-5420ec-set-your-own-combination-portable-lock-box-with-adjustable)

## Best For

- master lock enthusiasts

## Why This Product

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

## Key Features

- • **Spacious Yet Compact:** Holds up to 6 keys inside a sleek 7-inch tall lock box—perfect for real estate pros, property managers, and busy households.
- • **Built to Brave the Elements:** Durable metal body with vinyl coating and weather cover protects your keys rain or shine, indoors or outdoors.
- • **Universal Fit, Maximum Convenience:** Adjustable shackle cinches securely to most lever, ball, biscuit, and tulip door knobs—no more compatibility guesswork.
- • **Portable Security, Anywhere You Need It:** Lightweight and easy to install on gates, fences, or doors, so you never miss a moment or opportunity.
- • **Personalized Security at Your Fingertips:** Set and reset thousands of unique 4-digit combinations for ultimate control and peace of mind.

## Overview

The Master Lock 5420EC is a portable, weather-resistant lock box featuring a customizable 4-digit combination and an adjustable shackle that fits a wide range of door knob styles. With a durable metal body and vinyl-coated shackle, it securely stores up to 6 keys, making it ideal for both indoor and outdoor use. Its compact design and versatile mounting options provide professional-grade security and convenience for homeowners, real estate agents, and property managers alike.

## Description

Keep your keys secure and accessible with the Master Lock Set Your Own Combination Portable Lock Box. This small lock box features an adjustable shackle, making it easy to attach to a variety of outdoor fixtures, such as gates or fences. This key lock box is perfect for your home or business use, allowing you to securely store multiple keys for easy access by authorized individuals. Designed for outdoor use, it is built to withstand the elements, ensuring your keys remain safe and protected. The durable black finish not only provides a sleek appearance, but also adds an extra layer of security to your key hider. Whether you need a key hider for your own use or are looking to provide access to house sitters or maintenance workers, this key safe is the perfect security solution. This portable lock box offers peace of mind knowing that your keys are safely hidden and easily accessible when needed. With its convenient wall mount design and adjustable shackle, you can easily install this key lock box in a variety of locations around your property, providing added convenience and security.

Review: Top of the line - Works well, solid quality
Review: Great product - Has worked great, used everyday twice a day outside in the elements. Have used it almost 2yrs now.

## Features

- Adjustable shackle cinches lock box tightly and securely to most lever, ball, biscuit, and tulip door knob styles.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.
- Set your own 4 digit combination lock box for easy combination recall, set and reset your combination allowing thousands of personalized combination code options
- For indoor and outdoor use, vinyl coated shackle and molded bumper prevent scratching, metal body construction for durability, weather cover protects combination dials from outdoor elements
- SPECIFICATIONS: External Dimensions: 7in (177.8) H x 2.875 in (72 mm) W X 2.06 in (52.50 mm) D Internal Dimensions: 4.188 in (106.37 mm) H x 2.375in (60mm) W x 1in (25mm) D Shackle Length: 75 in to 1.75 in (19mm to 44mm) Shackle Width: 1.406 in (35.71mm) Shackle Diameter: .375 in (9.52mm)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07FD2N88X |
| Additional Features | Portable |
| Best Sellers Rank | #2,852 in Office Products ( See Top 100 in Office Products ) #6 in Security Lock Boxes |
| Brand | Master Lock |
| Brand Name | Master Lock |
| Color | Black |
| Control Method | App |
| Controller Type | Hand Control |
| Customer Reviews | 4.6 out of 5 stars 862 Reviews |
| Finish Types | Vinyl Coated |
| Global Trade Identification Number | 00071649312694 |
| Included Components | lock box, owners manual |
| Item Dimensions | 2.06 x 2.88 x 7 inches |
| Item Type Name | Set Your Own Combination Portable Lock Box with Adjustable Shackle |
| Item Weight | 1.3 pounds |
| Item dimensions L x W x H | 2.06 x 2.88 x 7 inches |
| Lock Type | Combination Lock |
| Manufacturer | The Master Lock Company |
| Manufacturer Part Number | 5420EC |
| Manufacturer Warranty Description | Limited Lifetime Warranty |
| Material | Metal, Plastic |
| Material Type | Metal, Plastic |
| Model Name | 5420EC |
| Model Number | 5420EC |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Recommended Uses For Product | Real Estate, Home Security, Key Storage |
| Shape | Rectangular |
| Special Feature | Portable |
| Style Name | Adjustable Shackle |
| UPC | 071649312694 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Master Lock
- **Special Feature:** Portable
- **Lock Type:** Combination Lock
- **Item dimensions L x W x H:** 2.06 x 2.88 x 7 inches
- **Material:** Metal, Plastic

## Images

![5420EC Set Your Own Combination Portable Lock Box with Adjustable Shackle, 6 Key Capacity - Image 1](https://m.media-amazon.com/images/I/51j47zV+XbL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Top of the line
*by B***T on August 17, 2026*

Works well, solid quality

### ⭐⭐⭐⭐⭐ Great product
*by D***S on April 24, 2026*

Has worked great, used everyday twice a day outside in the elements. Have used it almost 2yrs now.

### ⭐⭐⭐⭐⭐ Great Lock Box
*by C***. on May 3, 2025*

Needed a lock box that would work with our door handles - this one works wonderfully. You still have to turn the handle differently in order for the lock to not interfere with the door opening, but it’s not a problem to do so. The lock box is secure on the door handle and will work perfectly for our guests to use when we’re not at home.

## Frequently Bought Together

- Master Lock Black Portable Key Lock Box with Adjustable Shackle, Set/Reset Combination for Tenants, Guests, Clients, Ideal for Realtors, Landlords or Property Managers, Holds 6 Keys, 5420EC
- Master Lock 5490D Retractable Lock Box Key Tether Small
- Master Lock Key Lock Box, Outdoor Lock Box for House Keys, Key Safe with Combination Lock, 5 Key Capacity, 5400EC, Black

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**Shop now:** [https://www.desertcart.pt/products/78595563-5420ec-set-your-own-combination-portable-lock-box-with-adjustable](https://www.desertcart.pt/products/78595563-5420ec-set-your-own-combination-portable-lock-box-with-adjustable)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-12*