I really like the tactical pen thing, it’s literally just a pen that’s better at stabbing people, in case someone challenges you to a pen duel. In other situations, well, it turns out that despite hundreds of years of marketing it is not mightier than a sword.
I’ve heard of those before, the crown is normally ridged or has a shape that will help it dig in and cause more injury.
Yup. And the genius of that is that the same “attack crown” pops up on some cheap bike lights too since they share some parts. In case you want to hit someone with your entire bike.
TBH if you want to use a torch in self defence all this stuff is nonsense, the most useful thing you can do is shine it in their eyes- and any half-decent LED torch will do that job equally well.