The Pentagon Screwdriver is turned from a solid bar of Grade 5 Titanium offering a sleek, lightweight tool. Being made from titanium allows them to be taken into a non-permissive environment without being detected by a magnatometer.
They do abide by the TSA carry-on rule on screwdrivers under 7", so in theory they could stowed in your carry-on baggage with other approved tools. You may not want to carry it on its own simply because you may draw attention to it if it is the only tool in your bag. The final decision will rest with the TSA agents at the security checkpoint, don't make it an obvious call for them. TSA Link