A couple of weeks ago I bought a small electronic safe (I know safes are for the Advanced area but I'm only gonna focus on the lock itself)
It can be oppened in two ways (or at least it should be only two ways muhahaha):
- Insert the code, or
- Use a tubular key to bypass the electronic lock when you forget the code or it's out of battery. (https://www.dropbox.com/s/83k2y31e7o4l7pe/2013-01-27%2014.30.37.jpg)
This was my first "good" tubular lock. So I started to pick it.
I created this small wrench to do so, since I don't have the skill to build others I've seen arround. https://www.dropbox.com/s/sr8bae7wwjcshq1/2013-01-27%2014.37.35.jpg
You will only need a paperclip and a pliers.
- First, unbend and then rebend the paperclip like this -> https://www.dropbox.com/s/mb69j6cxcj3epxj/2013-01-27%2014.40.54.jpg
- Then, bend the tip 180º (it must about 2,5mm, it needs to fit perfectly on the lock in order to have a pivot point for tensioning) -> https://www.dropbox.com/s/3zisuzz4cwo4g40/2013-01-27%2014.43.35.jpg
- Again, halfway through the tip, bend it back 90º -> https://www.dropbox.com/s/2g7n24rn29du2lm/2013-01-27%2014.43.53.jpg
You have a Tubular Tension Wrench!
If you'd like you can make another bend to make the wrench with an angle like this -> https://www.dropbox.com/s/dlgcjt530xoiedb/2013-01-27%2014.46.54.jpg. I find it better for tensioning since that way I have a full clear path to pick the lock, but it's more of a taste than usefullness. https://www.dropbox.com/s/tobv4ajy4ff761g/2013-01-27%2014.46.21.jpg
One important advice. When you are bending the tip, bear in mind that if you don't get it at the first time, throw it away and get another paperclip. 90º and 180º bends and rebends will weaken the tip and it will break. I guarantee you. And it wouldn't be cool if it broke inside the lock wouldn't it?

Being made of paperclip, it will bend if you use too much force on it. Kind of a feather touch. But I found out that I can feel alot of what happens inside the lock. So it's like a win-win. It doens't let me force to much, but it still lets me feel everything I need to know to pick the lock.
Hope it helps!
Be safe!