4 ms·Aren't these actually called Security Torx heads?by smackfu 16y agoAren't these actually called Security Torx heads?evgen 16y agoA "security torx" has a small post in the center so that your torx driver requires a hollow center.jarin 16y agoScrew head escalation and countermeasures seem to have a lot in common with DRM. In fact, I'm going to coin the term "Physical Rights Management", or PRM :)