Astronauts use a portable foot restraint as a stable platform to stand on wherever they need to work outside the spacecraft. This one was used on space shuttle missions to service the Hubble Space Telescope. Mounting brackets for a foot restraint were strategically placed around the shuttle payload bay and on the telescope to give an astronaut access to various worksites. The spacewalker inserted the adjustable shaft into a bracket and then secured both booted feet under the toe bridges and into the heel clips. The pitch and yaw levers permitted adjusting the angle of the foot restraint for the best work position. Portable foot restraints were a standard crew aid on shuttle and International Space Station missions.
NASA transferred this device to the Museum in 2011.