Last pin not pickable

[pickfox]

Hi!
I try to pick this training lock, but the fourth pin always gets stuck
and can't be moved any more.

When I release the tension, it's also the pin that snaps back first.

Do I use too much tension? Could this some kind of security pin?
Thanks for any ideas!

[Squelchtone]

Yes, those 2 pins on the right, the 1st and 2nd pin are security pins meant to make lock picking more difficult.

Watch this video, it will help:

[pickfox]

Thank you! That's a good explanation.