Xbox One Fan

The Pentalobe screw, also known as the "Evil Proprietary Tamper Proof Five Point Screw," is Apple's favorite fastener. It’s similar to a Torx—except that the points have a rounder shape, and it has five points instead of six.
When Apple implemented it in 2009 no reputable suppliers sold the screwdrivers that Apple technicians used. We reverse-engineered the screw and manufactured our own drivers, turning this security measure into another insignificant speed bump that fixers can easily bypass.