These are really cool and you can bring them past metal detectors.
https://www.amazon.com/dp/B006U4CPUS?psc=1&ref=ppx\_yo2ov\_dt\_b\_product\_details
I carry a stinger with me. this will break bone with minimum force. https://www.amazon.com/Comtech-Stinger-Keating-Re-designed-Manipulator/dp/B006U4CPUS#:~:text=Product%20description,of%20its%20normal%20manual%20dexterity.
It hurts.
Look at the Comtech Stinger