FedEx’s four newest employees – Randall, Sue, Collin, and Bobby – look a little different from their co-workers. Standing over 6 feet tall and clad in metallic blue, these laborers can work for 24 hours a day, seven days a week without ever needing a break.

Randall, Sue, Collin, and Bobby are robots. FedEx has teamed up with San Antonio-based Plus One Robotics and Japanese manufacturer Yaskawa America to implement four new fully operational robotic arms in its small-package sorting system at its Memphis, Tennessee, hub. FedEx is headquartered in Memphis with this “SuperHub” – its largest sorting center in the U.S.