Replacement of the Orbital Replacement Units (ORU) mounted on the Kibo-EF will be done by the Kibo Remote Manipulator System (KiboRMS). The KiboRMS consists of a main arm which is about 10 meters long and a small fine arm which is about 1.5 meters long and grappled by the main arm when in use. Both arms have 6 joints (6 degrees of freedom) and can move like a human's arm. The Space Station crew will operate these arms using hand controllers in the Kibo pressurized module.
The KiboRMS is one of the most functionally important and technically advanced components of the Kibo. Prior to the Kibo launch, the Manipulator Flight Demonstration (MFD) mission will be conducted to secure KiboRMS development by conducting a flight demonstration test of a robot arm based on the KiboRMS Small Fine Arm, onboard the Space Shuttle.