Riddick (Vin Diesel) Hero Handcuffs
 

This pair of hero metal handcuffs were used by Vin Diesel during the scenes where he is being transported into the Crematoria slam by Toombs and his team and later in the depths of the slam just the detached wrist-cuffs were used around Riddicks wrists to simulate the broken ends of the cuffs from his decent on the rope. They can be disassembled from a set of fully functioning handcuffs to just the wrist-cuffs which can be removed with the flick of a switch.