Here in the USA, if it looks like it could be used to hit someone with, TSA will confiscate it. Remember, this is the most enthusiastic and effective arm of the government (hear the sarcasm in my voice?). They'll harass a mother into drinking her own breastmilk from her baby's bottle to prove its not a bomb, but will let certain individuals bypass security lines if they pay extra and vouch online that they won't bring anything dangerous onto the plane.
And if you're flying in from out-of-country, you'll also deal with Customs. It's just easier to put your tools in your checked luggage rather than try to convince multiple checkpoints that it's not a weapon.