In general for women (no offense-they are typically not aggressive enough or trained enough for a weapon) I typically have them get two (there are now cartridge refillable types) of the OC/Mace/UV stain sprays as selfdefense, and RUN.
The kubotan, as any weapon, can be easily taken from a non aggressive, untrained person (or even aggressive and trained) and used against them. The OC/mace/UV stain as indicator spray best bet for untrained women (and men). One cannister is for practice to see the distance and spread, and a blast in the wind so they know what they have.
Just MHO -Karl. peace.
I asked bout the kubaton cause there are deep muscle protected nerves it can reach, as well as joint locking.
as to instructional vid or text??I dont know, I assume Fumio Demuria must have made one sometime and lots of MA or handgunner mags might have a video. Most of the locks are finger and wrist and so an aid in Chin Na for those easy but hard places
do not try to spork the post, for that is impossible, only realize there is no post to spork