My PB1 did tear the my Instroke interior...
I am not sure about Powerbreak Pro, but I did own a Powerbreak One (PB1), and I made a mistake put it into my instroke case (I was not cautious enough because my everyday case was a Whitten 3x6, and PB1 went in and out without a problem), then it wouldn't come out.... :frown:
In the end I had to use brutal force to pull PB1 butt out of my instroke case, in the process the interior cloth was torn... felt very awful about it....
Next day I had the PB1 changed to leather wrap.