Let me help explain how so much stuff gets confiscated. I had a cresent wrench in the bottom of my backpack.
A. I had no idea it was there.
B. Even if I had known it was there, it never would have crossed my mind that it was confiscatable. What am I going to do with it? Loosen key bolts? Threaten to squish the pilot’s nose?
I have no idea how people forget they are trying to carry guns onto a plane though. I carefully pack my pocket knives and pointy things in my carryon checked luggage.
Not So Fast 