Master Lock
Master Lock
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Product Support

How to Choose a Safety Padlock How to Choose a Safety Padlock
Master Lock offers different types of safety padlocks, choose the one that fits your situation.
How to Register a Keying System How to Register a Keying System
How to help prevent duplicate key codes in your facility with this free service from Master Lock.
Care & Maintenance Care & Maintenance
How to keep your safety padlocks operating for years and years.
Installation Instructions Installation Instructions
Instructions on how to use all the different lockout devices we offer.
Custom Padlock Marking                  Padlock Marking Custom Padlock Marking
Choose from permanent Laser engraving, photo identification labels or text labels in multiple languages.
Life Testing – Guardian Extreme Tags & Signs Life Testing – Guardian Extreme Tags & Signs
Guardian Extreme Tags and Signs have been tested and are also ideal for use outdoors and have been put thru rigorous environmental testing. No other signs last this long!
Designing Custom Tags & Signs Designing Custom Tags & Signs
Durable, long lasting Guardian Extreme™ Tags and Signs can be customized to enhance your safety message.
Master Lock Safety Solutions Master Lock Safety Solutions Sweepstakes