Now here is a bit of a trick – once you have picked it open only rotate it a bit.
Take a business card roll it to the size of the lock – tape it up a bit.
Now jam that rolled up card into your picked open keyway.
Push hard enough to get the impression of those pins on the tip of that card and now you can use that as the key and open it all the way.
The Mantis takes a bit of practice but you can do it!