Just want to add my experience...for what it's worth. CHECK THE IFIXIT.
I recently traveled to/from MHT and MIA, but frequently travel to/from MHT and ILM as well as CLT. Ever since acquiring this gem of a toolkit, not once have I made it through the TSA process without getting pulled aside and have my backpack torn apart. Seems all TSA employees love this toolkit too! :0) I haven't had anything confiscated. In the end, I usually make day or overnight trips - this extra attention is almost ridiculous enough to make me start considering checking a bag (with just the toolkit in it).
Safe travels.
