Every snap of the blade would be in 45 degree. The one shown in the picture is just a prototype that helps us to verify because at this moment we are not able to make a real one.
Thanks for the question :)
Based on the last photo in your update, your 45 degree blade ( the middle blade) will turn to a 30 degree blade once the front portion of the blade become not sharp and need to break it off, am I correct?
I can say that today I have learned something new. I had no idea of these differences between blades.
Thanks for the clear explanation!