[[File:Penal Legionaire.jpg|thumb|right|300px|[[Penal Legionaire]] wearing a bomb collar.{{Fn|4}}]]

'''Explosive collars''' are most often seen used to ensure cooperation from the most unruly of [[penal legion]]aries,{{Fn|1}}{{Fn|2}}{{Fn|3}}{{Fn|5}} such as the infamous [[Ghasts of Voll]]. They are also often a part of many [[bounty hunter]]s' kits, and are also used on various prison transports. Sometimes being used on [[League of Black Ships|Black Ships]] which can carry many dangerous [[unsanctioned psyker]]s.{{Fn|5}}