I have been carrying a tactical pen every time I leave the house for the past several months, in addition to a fixed blade knife and a Leatherman. The Leatherman is attached to my cell phone case. I normally carry the pen in my right front pants pocket. I have walked through airport security a couple of times with it on me and it didn’t set off any alarms. I usually put it in my carry on. The one I have writes real nice and is about the size of a regular pen. It is only a pen with a glass breaker, no flashlight, bottle opener, etc. it is made of heavy duty aluminum.
I have two freebie pens alongside for comparison.