Hammerhead Morty is a Caucasian teenage boy with the head of a giant hammer. His hammer head appears to be made of gray metal, and his face is located on the face of the hammer. Hammerhead Morty's hands, however, seem to be made out of human flesh. His body seems to be rounded and pole-shaped, just like the handle of a hammer, implying that his entire body could be a hammer. Hammerhead Morty wears a yellow t-shirt, like all of the other Mortys.