This may help, although we don't see them used, there are different types of detonators.
Class-A (used by Leia in Jabba's palace):
http://starwars.wikia.com/wiki/Class-A_thermal_detonator
Baradium Core Code-key (worn by the clones and classic troopers):
http://starwars.wikia.com/wiki/Baradium-core_code_key_thermal_detonator
The biker scout variation is similar to the second version. Of course, it's all just Sci-Fi goodness.