7 Surprising Facts About Locks You Probably Didn’t Know

When we turn a key, push a pin pad, or twist a deadbolt, we rarely think about how fascinating locks really are. Yet behind every lock lies a story—of invention, mystery, and even royalty. Whether you're a homeowner, business owner, or just someone who loves curious facts, here are 7 things about locks that might surprise you.

1. The Oldest Known Lock Is Over 4,000 Years Old

Locks aren’t a modern invention. The oldest lock we know of was found in the ruins of ancient Nineveh (modern-day Iraq) and dates back to around 2000 BC. It was made of wood and used a pin tumbler mechanism—the same basic principle still used in many locks today!

2. The Egyptians Invented the First Pin Tumbler Lock

Long before Yale or Kwikset existed, ancient Egyptians created a mechanism using wooden pins that could be lifted by inserting a specially shaped key. Their keys were large and often worn over the shoulder. Function met fashion!

3. The Word ‘Locksmith’ Comes From ‘Smith’—As in Blacksmith

A “smith” is someone who works with metal, and locksmiths were originally skilled artisans who hand-forged locks and keys from iron and steel. Even today, locksmiths combine mechanical expertise with creativity and problem-solving—just with more modern tools!

4. Some Old Locks Were Designed to Trick Thieves

In medieval Europe, lockmakers began designing “trick locks” with fake keyholes, hidden mechanisms, or decoys to confuse intruders. Think of them as the early versions of today’s smart locks and decoy safes.

5. Queen Elizabeth I Had Her Own Royal Locksmith

Back in the 16th century, security was taken very seriously—especially in royal palaces. Queen Elizabeth I appointed a personal locksmith who not only built locks but also had to ensure no one else could duplicate them. The job came with great trust—and great risk.

6. Modern Padlocks Haven’t Changed That Much

Today’s padlocks may look more polished, but their internal mechanics are still similar to designs patented over 150 years ago. The iconic “Yale Lock,” invented in 1848 by Linus Yale Sr. and improved by his son, is still the basis for most cylinder locks used today.

7. Not All Locksmiths Are the Same

Many people think locksmiths only unlock doors—but we do far more. From installing advanced deadbolts and smart locks to rekeying locks for homebuyers or helping businesses secure their premises, locksmithing is a blend of art, engineering, and psychology. (Yes, sometimes we think like burglars to stop them!)

Final Thoughts

Locks have protected treasures, secrets, and people for thousands of years. And while the tools may evolve, the need for safety, trust, and skilled craftsmanship stays the same.

If you're in the Sunshine Coast and need anything from a quick lock repair to a full security upgrade, Jarrah Locksmithis here to help—local, professional, and always curious about the craft.

Need help securing your home or business?
📞 Call Jarrah Locksmith today or Request a Quote Online!