I've seen this used in a variety of different applications, including locking doors, locking heavy machinery and power tools, as well as locking elevators.

They're made in China and branded under dozens of company names for demonstration purposes.

I've set this up with an electric strike plate.

It opens when either the egress button is pressed from the inside of the door, where the correct code is entered from the outside.

That code is currently 1234 Now, by passing a lock like this can be very simple.

But there are pitfalls for the unwary, the most significant of which is the anti tamper switch on the back.

It detects someone removing this plate.

Now the overwhelming majority of the time that tamper switch will not be connected to anything.

Even so, I'll show you how to bypass the switch using a paper clip, because that's what you'll have to do if you need to look at the wiring.

However, if you're familiar with how these air wired and the schematics are readily available, online, you'll realize that disabling the switch isn't necessary.

And, frankly, it's often the hard way in the easy way requires nothing but my Swiss Army knife key chain.

Let me show you how that's done.

The first thing we need to do is loosen these two screws that allows me to look right under the cover plate and find the appropriate contact points.

I'm now going to bridge that con contact point to the cover plate, and the lock is open now without going too much into what I just did.

I located the contact point for the egress button.

I then bridged it to the cover plate, which connects the circuit and fools this lock into thinking someone on the inside of the door pressed the egress button.

Now, if this is used in a non typical installation, you'll need to take a closer look at the wiring, and that may require disabling the tamper switch.

So let's do that right now.

I'm straightening the paperclip with the exception of a small hook, then going to loosen this just a little bit more and find the spring that is attached to the anti tamper switch.

Okay, I've hooked that spring.

Now I'm going to fold the paper clip over, and that should allow me to remove the screws without any fear of an alarm going off.

Okay, now that I flip this over, we can see the anti tamper switch.

It's connected to a spring that presses on the back of the electrical box.

By pulling that spring to the side, I ensured that anti tamper switch stays depressed and no alarms go off.

However, now that I have this out, I see there are no wires going to the anti tamper switch.

That means I can let go of this because there's no internal alarm.

I can also now see how this is wired.

It's in normally open mode.

That means I can reached some contacts to open the strike plate.

I can also trigger the egress button, and I can also do what you saw me do with the Swiss army knife.

And that is touch the egress, Contact Point and Bridget to the cover plate.

So as you can see if you're familiar with these common keypad locks, bypassing them is a fairly simple task.

In any case, that's all I have for you today.

If you do have any questions or comments about this, please put them below.

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And, as always, have a nice day.

Thank you.