A hand grenade is a small, portable explosive device designed to be thrown by hand. It typically consists of a metal or plastic casing filled with explosive material and a fuse. When the fuse is ignited, it creates a blast that can cause damage to nearby targets. Hand grenades are commonly used in military operations and by law enforcement. There are various types of hand grenades, including fragmentation grenades, which disperse shrapnel upon explosion, and smoke grenades, which produce a cloud of smoke for concealment. They are an essential tool in combat situations, providing soldiers with a means to engage enemies from a distance.