From WiKirby, your independent source of Kirby knowledge.
Iron Hammer is a stage hazard that appears in Kirby: Planet Robobot. It first appears in the Gigabyte Grounds level, in the factory stages. It resembles a large toy hammer, attached to a rotor that spins it along the z axis. As such, the head of the hammer routinely flies in and out of the area where Kirby can walk, presenting a hazard if it hits him. Should Kirby get hit by the hammer, he will either get sent flying off into the distance, or smacked into the screen, depending on which way the hammer was moving. Contact with the hammer from the side while it is in Kirby's field of motion will only hurt him, not launch him.
Iron Hammer can be destroyed using any attack from the Robobot Armor. Doing so will sometimes drop Point Stars.
In Kirby: Planet Robobot, Iron Hammer can be found in the following levels and stages: