In today’s modern age, security measures have improved so dramatically that even locks are becoming very advanced. Many security measures can now even be voice-activated and monitored from a remote location. It’s an impressive advancement considering where locks began centuries ago. With so many different types of locks that have come and gone, it’s easy to forget a few lock types that might have made a difference at some point in your life. Modern locks continue to advance each day, but these 5 locks that you might have already forgotten about were simply some of the best.

5 Lock Styles You Might Have Forgotten About

1. Combination Locks

One way to describe these locks is that they are tiny. We’re not talking about the style that you used to have on your locker door. These particular combination locks are cylindrical in shape and a whole lot smaller than the large dial style combination locks.

They worked by turning independent dials, each of which has a number to choose.  Putting the numbers in a specific sequence opens the lock. The sequence is put in place by rotating one or a few dials that interact with discs inside the lock. It sounds more complicated than it actually is, but they work perfectly. Think about your dad’s briefcase that you tried to get into when you were little. No matter how many times you tried to guess the combination, you just could not get it open. These locks used to be used quite often, but now you rarely see them.

5 Lock Styles You Might Have Forgotten About

2. Straight Shackle / Shutter Padlocks

Straight shackles are a type of padlock that you don’t see much anymore. They are operated by a key, but what makes this padlock different from the rest is its unique shape. The lock has a solid, U-shaped base that has a straight shackle across the top. The shackle comes off by sliding it out once it’s been opened with a key. It can then be slid back in place and locked again. It may seem inefficient, but it works just as well as other padlocks. This type of padlock was used mainly for putting chains together to lock gates. They’re also mainly used for roller shutter doors and even locking shipping containers.

5 Lock Styles You Might Have Forgotten About

3. Pocket / Sliding Door Lock

There was a time when pocket doors were one of the best amenities in your house. They can split up an area easily and conveniently without the permanency of solid walls. Many pocket or sliding doors from times past come equipped with a tiny locking mechanism. As small as these door locks were, they were highly effective. These locks work with a simple hook and latch mechanism that can be operated by anything that can fit into and turn their locking notch. We’ve seen dimes, spoons, rings, and many other things used to open pocket doors. They all work. Other sliding door locks can be operated with a simple turning knob. These can be found mostly on patio sliding doors. You can still find these types of locks in older buildings today, but most new constructions will be devoid of these tiny wonders.

5 Lock Styles You Might Have Forgotten About

4. Hook and Eye Latch

The way a hook-and-eye latch works is simple; many have probably wondered how they weren’t the one to invent it. This lock obviously has two components: the hook and the eye. The hook catches the eye, and that’s what creates the lock. These are usually made of sturdy metal and are attached to walls, doors, or windows using a screw. You can still see hook-and-eye latch locks from time to time. They were once a very popular way to keep an old, wooden window open. There are much better lock alternatives today, but we will always remember how the hook and eye latch was used to keep bathroom doors closed and locked back in the days.

5 Lock Styles You Might Have Forgotten About

5. Hasp Lock

We’re not sure when the last time was that we saw a hasp lock. A hasp lock can only work as a proper lock if you put a padlock through its loop. While it may have worked then, it wasn’t the most secure type of lock considering that one could easily kick it open. Hasp locks use a two-part system: the loop, and the hasp that goes over it. The loop is typically made of hardened steel, but it doesn’t make it impervious to cutting. They still work well, but don’t hide your millions using a hasp lock because it won’t give you the security you need.