Just recently came from a trip to Europe/Turkey. At USA airport was able to walk thru a metal detector with keys on my neck, (totally forgot I had them on) without it being detected, even thou i emptied my pockets, took belt and shoes off. TSa will most likely not give you any issues, but At Istanbul airport for a transfer flight I was checked 3 times, patted down, and my carry on bag was meticulously inspected, on the way to USA, they even made me take my i pad out of its case and wiped it with a explosives' detecting agent. however when I was flying into Europe at the same Istanbul airport I was not checked at all, not once.
My advice keep it in a checked in luggage, for presents I was bringing a condor machete, several multitools, ZL53, and noktgon D18, with batteries installed, as well as almost 100 of alkaline cells in packages. No issues whatsoever.