Fragmentation is also a designation for a type of munition. It indicates that the munition (or warhead, shell, grenade, whatever) is designed to do damage primarily by ejecting fragments away from the detonation at high speed. These fragments can be part of the munition casing, such as in the original 'pineapple' grenade of World War II, or can be additional objects added to the device as in the modern variant of the hand grenade. Surface-to-air missiles and air-to-air missiles tend towards this type of warhead, since the fragility of their targets means the lethal radius of the warhead is increased significantly over a simple blast warhead (although recent SAMs favor the continuous-rod warhead instead).