Gearhead

Gearhead is the name of two DC Comics supervillains.

The first Gearhead appeared as a henchman of the supervillain called White Rabbit.

The second Gearhead is Nathan Finch, a former engineer at General Robotics. While he was kidnapping and holding Gloria Osteen, his boss' daughter, for ransom, he runs afoul of Batman who rescues her. Unfortunately, he was not able to save Nathan from falling to an icy death. Nathan Finch's body was discovered by two down-and-out people who take him to an underworld doctor named Dr. Bascomb. It turned out that Nathan was not dead and the doctor wanted his knowledge of cybernetics. Due to ravages of frostbite, Dr. Bascomb removed his arms and legs and replaced them with cybernetic arms and legs. Following a training with his cybernetic limbs, Nathan becomes Gearhead and develops his own cybernetic arsenal of removable body parts as well as a goal to exterminate Batman, whom he refers to as the "vermin".