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Master Lock offers the best in customer service and provides extensive product support. No matter your issue, we're here to help you solve it.
- Reset & Retrieve Lost Combinations
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Keying Options & Lock Customization
Take total control of your security products with keying & custom services. With various body sizes, shackle and keying options, these locks are tailored to your needs.
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Custom Marking
Master Lock offers laser engraving for complete customization. Consider engraving your company name and logo.
Laser Engraving Forms
Store Your Combo
Never worry about losing your combination or key code again. Safely store and retrieve it in one secure place for no extra charge.
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Master Lock Vault Enterprise
Master Lock Vault is an integrated platform that lets you issue and revoke access to individuals or groups in real time. Take complete control of your lock system.
Vault SupportProduct Support
Reset & Retrieve Lost CombinationsSet-your-own combination instructions, combination reset, lost combination help
Lost Keys & Key ReplacementsReplace keys, replace locks, key duplication
Product Maintenance & ReplacementsLock maintenance, warranty information, part replacements
School Locker LocksCombination charts, lock service, lock replacements
Bluetooth & Electronic Lock SupportBluetooth locks & lock boxes, padlock service
Vault SupportAdding & removing users, app support, lock settings
Door Locks & HardwareReplacement parts, commercial door lock service, residential hardware support
cLOTO SupportDo you need cLOTO support?
Safes SupportBatteries, warranty information, lost key or combination help
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Operating The Master Lock 5400D & 5401D Lock Boxes - YouTube
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[16] How To Open A Master Lock Box With A Soda Can!!! - YouTube
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[PDF] Master Lock 5400D Instructions
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5401D Wall Mount Lock Box Instructions - Master Lock
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Service And Support - Videos: Lock Boxes - Master Lock
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[PDF] Operating Instructions:
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Master Lock 5400D Portable Lock Box Instructions - Manuals+
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How To Open A Master Lock Box [Even If You Forgot The ...
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Select Access® Key Lock Boxes: Operating And Mounting Instructions
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Master Lock Lock Box, Set Your Own Combination Portable Key ...
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7 Quick Ways To Open A Lock Box Without A Key - United Locksmith
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How To Open Master Lock Key Box (Without A Code)