Read this (one student from my previous course):

http://candicobbler.com/blog/?p=632

And the shoe she created:

I am working on my website, which takes a lot of energy so sorry, that I don’t post a lot. I promise that will change soon.

I am about to start an online pattern-making course, which would be a part of a longer term e-learning course. Your feedback would be important in this topic – so share your opinion with me…

This is the mysterious tool again, and after plenty wrong guess, here is the correct use.

Yes, it is for crimping. More games?