Wrench is a young worker Doozer on Fraggle Rock. He can be recognized by a tuft of brown hair. Wrench and Cotterpin are best friends. His mother is Modem Doozer.
In the episode "The Doozer Contest," he gets into a fight with Cotterpin Doozer.
In the Fraggle Rock episode "Doozer Is as Doozer Does," Wrench gets the dreaded hiccups after Turbo Doozer pressures him to start "flooping."
In the episode "The Voice Inside," Wrench goes on an adventure with Gobo and Sprocket, who accidentally ends up down in Fraggle Rock.