A hand grenade is a small explosive device designed to be thrown by hand. It typically consists of a metal casing filled with explosive material and a fuse. When the fuse is ignited, it detonates the explosive, creating a blast radius that can cause damage to nearby targets. Hand grenades are commonly used in military operations and can vary in type, including fragmentation, smoke, and stun grenades. The design of hand grenades allows for easy handling and deployment in combat situations. They are often used to clear enemy positions or create diversions. Proper training is essential for safe use, as mishandling can lead to accidental detonation and injury.