Master keys make it possible to unlock multiple locks with one key. They allow you access to multiple doors in buildings and make it much easier on those needing access.

In a padlock only Master Key System, any of the Master Lock ProSeries® padlocks and most laminated padlocks can be used. However, there cannot be cross-over to locks that use either …

Keying Tool for on-site use with Universal Pin padlocks. Produces custom-pinned locks in minutes. We aim to show you accurate product information. Manufacturers, suppliers and …

In this video I'll show you how to key a Universal Pin One Key Master Lock System. If you have a lock that a bunch of keys work with and you need to replace the lock, it's fairly quick and easy...

Master key turning a pin tumbler lock with two shear points A master key operates a set of several locks. Usually, there is nothing different about the key. The differences are in the locks the key …

Unlike traditional locks that require separate keys for every door, a Master Key System allows authorized personnel to open multiple locks with a single key. This eliminates the need to carry …

May 21, 2018 · APPLICATION: These padlocks are ideal for all outdoor applications when needing multiple locks that utilize ONLY one key. The #37 latch lock works well on 1-7/8 and 2 …

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Sep 19, 2025 · Learn how a master key works across multiple locks, how systems are structured, and why they’re ideal for managing access control.

Need a master key system installed? Our expert locksmiths install, repair or replace master keys, for business and personal use. Call now for a quote!