The Hammer head is an item in Super Smash Bros. Melee and Brawl. It only appears when it falls off a Hammer. It can be thrown for powerful damage and extremely high knockback, KOing opponents even at low-to-medium percentages. It deals 35% when Forward Smash Thrown and up to 37% when Up Smash Thrown. In Melee, the bonus Headless Hammer is awarded if the Hammer Head falls off the player's Hammer. After thrown, it will disappear unless picked up by a player.
A hammer is just a stick until you add the top. That's where this item comes into play. Sometimes, however, the top comes off. If that happens, just grab this loose part and throw it at your enemies. For some poetic justice, make the guy swinging the hammer handle your first target.