it makes the wearer a different kind of sap as well.
these toys are so ridiculous. my favorite is the tactical kubaton pen with a flesh-gouging crown on one end. i think they call the crown a "DNA Catcher", which is only barely a euphemism. it's useful for those situations where you're mugged while holding a pen and don't have time to grab any one of the other dozen toy weapons on your person.
i would just love to see someone go to a police station ranting about the "attacker" they disabled at the bank, and proffer their gore-encrusted pen as DNA evidence. i'm sure they'd be impressed.