This knife was used by Vin Diesel during the the filming of The Chronicles of Riddick. It’s a very decorative design and is made of a dense rubber to protect the actors during filming and was used by Riddick on board the Necromonger ship to send a few Necromongers to the Underverse!
Beautifully screen-matched to the knife on screen that Riddick carries and pulls from his belt on board the necromonger ship (see below)
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