Is this the reason they have switched to Pentalobe screw. I have googled for material but couldn't find anything. Pentalobe screws are not that hard to find and considering the popularity of Apple devices, they will get easier to find. When I compare them to Torx screws I suppose the points rounder shape makes the screwdriver more resistant, which may be an advantage when assembly millions. I am no expert, and I would appreciate if someone has an informed opinion.