A Grenade is an explosive that can be thrown by hand. while many grenades exist, the Rosen Family prefers to use a specific model of a grenade known as the Mk 2 hand grenade. The most common way the Rosen family uses a grenade (or any explosive) is by forcibly shoving a grenade into an enemy's mouth.
While police and Military officials carry grenades on a holster, Michael Rosen and Michael Plumson are able to carry grenades in their ears. During the Manchester Airport massacre, Harold Rosen was able to carry hundreds of grenades in his pocket.