📘 Master Lock manuals • Free online PDFs

Master Lock Manuals & User Guides

Master Lock is a global leader in security solutions, manufacturing authentic, enduring padlocks, combination locks, safes, and safety products for consumer and industrial use.

Tip: include the full model number printed on your Master Lock label for the best match.

Master Lock Support

Official site: https://www.masterlock.com/
General support: https://www.masterlock.com/support
Warranty & registration: Warranty info
Support phone: (520) 377-2804
Contact form: Contact manufacturer support

Master Lock manuals

Latest manuals from manuals+ curated for this brand.

Master Lock Quick Access Compact Safe User Manual and Guide

Manual

This user manual provides instructions for the Master Lock Quick Access Compact Safe (models MLD08E, MLD08EB), covering setup, programming, operation, security, and troubleshooting. Learn how to secure your valuables with…

Master Lock 270D Door Security Bar Installation Instructions

Installation Guide

Step-by-step installation guide for the Master Lock 270D Folding Door Security Bar, designed for hinged and sliding doors to enhance home security.

Master Lock 5400D Shackle Model Key Storage Lock Box Instructions

Instruction Sheet

Detailed instructions for using, setting a new combination, and hanging the Master Lock 5400D Shackle Model key storage lock box. Learn how to operate the combination lock and secure your…

How to Change Combination on Master Lock M176XDLH Padlock

instruction

Step-by-step instructions for changing the combination on your Master Lock M176XDLH padlock. Learn how to reset your combination easily and securely.

Master Lock Combination Lock with Key: Setting and Retrieving Your Code

Instruction Sheet

Learn how to easily set a new combination and retrieve a lost code for your Master Lock combination padlock with key. Step-by-step instructions for security and convenience.

Master Lock 2120DWD Computer Lock Instructions

instruction manual

Step-by-step instructions for setting the combination, securing, and using the Master Lock 2120DWD computer lock with spacers. Includes troubleshooting tips for a secure fit.

Master Lock #5400D Key Storage Combination Lock Instructions

Instruction Manual

Comprehensive instructions for operating, setting combinations, and using the Master Lock #5400D portable key safe with shackle. Learn how to open, secure, and maintain your key storage lock.

Master Lock Key Safe Troubleshooting Guide

Troubleshooting Guide

Step-by-step troubleshooting guide for Master Lock key safes, covering opening, closing, and resetting combinations.

How to Use a Master Lock Combination Lock: Step-by-Step Instructions

Instructional Guide

Learn how to open a Master Lock combination lock with these easy step-by-step instructions. Covers identifying parts, finding your combination, and the four steps to unlock. Includes advice on storing…

Master Lock Fire and Water Resistant Chests and Files User Manual

Manual

Comprehensive guide to using and caring for your Master Lock fire and water resistant chests and files, including operating instructions, important safety information, and warranty details.

Master Lock 3126EURDAT Strap Set Instructions for Use

Instructions for Use

Step-by-step instructions for using the Master Lock 3126EURDAT strap set for moving heavy items, including safety precautions and maximum load capacity.

Master Lock Model 175D Combination Change Instructions

instruction

Step-by-step guide on how to change the combination for the Master Lock Model 175D padlock.

Master Lock manuals from online retailers

Master Lock American Lock A701D Steel Padlock 2-1/2 Inch User Manual

A701D • November 17, 2025

Comprehensive instruction manual for the Master Lock American Lock A701D Steel Padlock, 2-1/2 inch. Includes setup, operation, maintenance, troubleshooting, and specifications for this durable keyed padlock.

Master Lock Heavy Duty Key Lock Box 5414EC User Manual

5414EC • November 14, 2025

Comprehensive user manual for the Master Lock 5414EC Heavy Duty Key Lock Box, providing instructions for setup, operation, maintenance, and specifications for this 5-key capacity combination lock.

Master Lock 4400D Bluetooth Padlock User Manual

4400D • November 7, 2025

Comprehensive user manual for the Master Lock 4400D Indoor Personal Use Bluetooth Padlock, covering setup, operation, maintenance, troubleshooting, and specifications.

Master Lock 1500D Combination Padlock Instruction Manual

1500D • November 3, 2025

Official instruction manual for the Master Lock 1500D Combination Padlock, covering setup, operation, maintenance, troubleshooting, and specifications.

Master Lock 1530DCM Standard Dial Combination Padlock User Manual

1530DCM • October 30, 2025

This manual provides instructions for the Master Lock 1530DCM Standard Dial Combination Padlock, covering setup, operation, maintenance, and troubleshooting.

Master Lock 5480EURD Key Cabinet Instruction Manual

5480EURD • October 29, 2025

This manual provides comprehensive instructions for the setup, operation, maintenance, and troubleshooting of your Master Lock 5480EURD Key Cabinet. Learn how to set your personal combination, install the…

Master Lock 614DAT 6' Self-Coiling Cable and Solid Brass Padlock Instruction Manual

614DAT • October 26, 2025

Comprehensive instruction manual for the Master Lock 614DAT 6-foot self-coiling cable and solid brass padlock, covering setup, operation, maintenance, and specifications.

Master Lock 6421LJWO Keyed Padlock Instruction Manual

6421LJWO • October 24, 2025

Instruction manual for the Master Lock 6421LJWO Keyed Padlock, covering setup, operation, maintenance, troubleshooting, and specifications.

Master Lock 5KA-A297 2-Inch Keyed Alike Laminated Padlocks (7-Pack) Instruction Manual

5KA-A297 • October 14, 2025

Official instruction manual for Master Lock 5KA-A297 2-inch keyed alike laminated padlocks, providing setup, operation, maintenance, troubleshooting, and specifications for the 7-pack.

Master Lock 105D Warded Padlock Instruction Manual

105D • October 11, 2025

Comprehensive instruction manual for the Master Lock 105D Warded Padlock, covering setup, operation, maintenance, and specifications.

Master Lock 5KA A451 Laminated Padlock User Manual

5KA A451 • October 4, 2025

Official user manual for the Master Lock 5KA A451 Laminated Padlock, providing setup, operating, maintenance, troubleshooting, and specification details.

Master Lock 5423D Push Button Wall Mount Key Safe Instruction Manual

5423d • September 29, 2025

Comprehensive instruction manual for the Master Lock 5423D Push Button Wall Mount Key Safe, covering setup, operation, maintenance, and specifications.

Master Lock video guides

Watch setup, installation, and troubleshooting videos for this brand.

Master Lock: Celebrating 100 Years of Security and Innovation

1:27 • 1920×1080 • brand_story

Master Lock Select Access Bluetooth Key Safe: Smart Home Access & Security

2:08 • 1280×720 • promo

Master Lock 5425D Light-Up Dial Wall Mount Key Lock Box: Setup & Installation Guide

3:10 • 640×360 • instructions