Thermal detonator

"Because he's holding a thermal detonator!"

- C-3PO, translating for Leia Organa, disguised as a bounty hunter

Thermal detonators were palm-sized, spherical devices that were used as extremely deadly explosive weapons. In addition to being surprisingly powerful for their size, they could only be turned off by whoever turned them on.

The Duros bounty hunter Cad Bane carried thermal detonators, and often used them during assignments. During the Galactic Civil War, Princess Leia Organa, disguised as a bounty hunter, threatened the crime lord Jabba the Hutt with a detonator in order to negotiate a deal.