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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 manuals from online retailers

American Lock A1107RED Anodized Aluminum Safety Padlock Instruction Manual

A1107 • September 10, 2025

Official instruction manual for the American Lock A1107RED Anodized Aluminum Safety Padlock. Learn about its features, setup, operation, maintenance, and specifications for optimal security and durability.

Master Lock 5KA-A445 Keyed Alike Laminated Padlocks Instruction Manual

5KA-A445 • September 9, 2025

Comprehensive instruction manual for Master Lock 5KA-A445 2" Keyed Alike Laminated Steel Pin Tumbler Padlocks, covering setup, operation, maintenance, and specifications.

Master Lock 1500T Combination Padlock Instruction Manual

1500T • September 8, 2025

Comprehensive instruction manual for the Master Lock 1500T Combination Padlock, covering product overview, setup, operation, maintenance, troubleshooting, and specifications for this indoor-use security device.

Master Lock Key Lock Box 5400EC3 Instruction Manual

5400EC3 • September 8, 2025

Comprehensive instruction manual for the Master Lock 5400EC3 Key Lock Box, covering setup, operation, maintenance, troubleshooting, and specifications.

Master Lock 5KA-A389 Commercial Grade Laminated Padlock Instruction Manual

5KA-A389 • September 6, 2025

Instruction manual for the Master Lock 5KA-A389 Commercial Grade Laminated Padlock, a 24-pack of 2-inch wide keyed alike padlocks with 1-inch shackle height, keyed to A389 key code.…

Master Lock 130D Brass Padlock User Manual

130D • September 3, 2025

Comprehensive user manual for the Master Lock 130D Brass Padlock, including setup, operation, maintenance, specifications, and warranty information.

Master Lock 63mm Rectangular Solid Brass Padlock User Manual

606EURD • September 2, 2025

User manual for the Master Lock 63mm Rectangular Solid Brass Padlock, providing instructions for setup, operation, maintenance, troubleshooting, and detailed product specifications. Includes information on the product's limited…

Motorcycle Helmet Lock-Master Lock #99KA - 2 Keyed Alike

99KA-2 • September 2, 2025

Helmet Lock by Master Lock - Model #99KA - 2 - *This listing includes two keyed alike cable locks and four keys. Parking your motorcycle and having no…

Master Lock M5XDLF Magnum Heavy Duty Padlock User Manual

M5XDLF • September 1, 2025

Comprehensive user manual for the Master Lock M5XDLF Magnum Heavy Duty Padlock, covering setup, operation, maintenance, troubleshooting, and specifications for optimal security and longevity.

Master Lock Key Lock Box with Code, Outdoor Lock Box for Realtors, Property Managers and Landlords, Ideal for Short-Term Rentals, Key Safe Holds 5 Keys, 5440EC Portable Box

5440EC • September 1, 2025

The Master Lock 5440EC Bluetooth Portable Lock Box. Open and manage with your smartphone or with temporary or permanent codes. Monitor who visits and when through the App…

Master Lock MLK5400D - Locking Combination 5 Key Steel Box Instruction Manual

MLK5400D • September 1, 2025

Instruction manual for the Master Lock MLK5400D Locking Combination 5 Key Steel Box, detailing setup, operation, maintenance, and specifications.

Master Lock 5400D Portable Lock Box User Manual

5400D • September 1, 2025

User manual for the Master Lock 5400D Set Your Own Combination Portable Lock Box, providing instructions for setup, operation, maintenance, and troubleshooting.