Is there "woo" and pseudoscience in police weaponry?

So first let me state I am not a police officer. I am a civilian currently looking for work with some security agencies in my area. I have been watching videos on youtube about police and security guards posting what they carry on there duty belt. I have ran across the orcutt police nunchaku and the rapid rotation baton and similar items. From what I understand police don't carry something unless it works. So my question i guess is are the things i mentioned "woo" items or do they work? Also does anyone have any other "woo" items they have seen?



Thanks

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