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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.

About Master Lock manuals on Manuals.plus

Maukati Matua is recognized around the world as the authentic, enduring name in padlocks and security products. Since its founding, the company has established a reputation for strength and quality, offering a broad portfolio of security solutions. Their product line includes the iconic laminated steel padlocks, dial combination locks, TSA-accepted luggage locks, and heavy-duty outdoor security devices like the Magnum series.

Beyond traditional mechanical locks, Master Lock innovates with electronic and bluetooth-enabled security devices, key storage lock boxes, and comprehensive safety lockout/tagout solutions for industrial environments. Whether securing a gym locker, a backyard shed, or a commercial facility, Master Lock provides durable products designed to provide peace of mind.

Master Lock manuals

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Master Lock manuals from online retailers

Master Lock 377KA Trailer Hitch Lock User Manual

377KA • February 10, 2026
Comprehensive user manual for the Master Lock 377KA Trailer Hitch Lock, covering setup, operation, maintenance, and specifications for 1-7/8 inch, 2 inch, and 2-5/16 inch trailer couplers.

Master Lock 8285EURDPRO D-Lock with Cable Instruction Manual

8285EURDPRO • January 22, 2026
This instruction manual provides detailed information for the Master Lock 8285EURDPRO D-Lock with Cable, a high-security bicycle lock designed for maximum strength and reliability. Learn about its features,…

Master Lock support FAQ

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  • Me aha ahau ki te wareware ahau ki taku huinga?

    For most standard Master Lock models, there is no master reset code. If you have lost the combination to a set-your-own padlock, the lock cannot be reset and may need to be replaced. Some serial-numbered locks may have retrieval options via the official support site.

  • How do I reset the combination on my Master Lock?

    Reset procedures vary by model. Common methods involve rotating the shackle 90 or 180 degrees and pressing down, or using a specific reset tool provided with the lock. Consult the specific manual for your model.

  • Are Master Lock padlocks weather resistant?

    Many models, such as the Magnum series or those with covered keyways and thermoplastic shells, are designed for outdoor use. Standard laminated locks are durable but performing regular maintenance with lock lubricant is recommended for outdoor environments.

  • How do I identify a TSA-accepted lock?

    TSA-accepted locks feature the Red Diamond Travel Sentry® logo. This allows airport security to open, inspect, and relock your luggage without cutting the lock.