Steeljaw is a Cybertronian dog that works for the Autobot Wreckers, though most specifically Leadfoot. His only appearence in the franchise is in the Dark of the Moon Toyline.
- Steeljaw is packed along with Leadfoot and a minifigure named Sergeant Detour in the Human Alliance part of the toyline. He can transform into a cannon that can be placed on several places on Leadfoot. He also comes with a "lead", which Leadfoot can hold in order to keep him in place.