I have the CRKT M16-12Z, Tanto. Interesting comment, the clip's pressure point is partially over a hole in the handle.
It hasn't caused a problem for my jeans or 5.11's, but I also do wildland fire and my (new, 1 fire, 2 weeks) nomex pants have already started to fray. I bet it "pinches" the material, pocket seam, on its attachment and removal.
Thanks for the comment, I know what to look for now.