When travelling to ferry aircraft, it can often be handy to have tools with you! However, you may be hesitant to carry on tools for fear of the T.S.A. thinking that you plot to dismantle the aircraft from the inside, one uncomfy seat at a time...
Fear not, for I have good news! As long as your tool is under 7" overall length, and is not sharpened, they are A-O-K with them! T.S.A. Guidance here
Some examples of tools that are ok are socket wrenches and sockets, stubby screwdrivers, pliers (but not dykes).