This handhold could be attached to the Manipulator Foot Restraint to provide a stabilizing grip point for the astronaut or a place to tether tools. Occasionally a second astronaut would hitch a ride on the Remote Manipulator System (Canadarm) by holding on here. NASA transferred a Manipulator Foot Restraint and this handhold from the Hubble Space Telescope program when the Space Shuttle program ended. This equipment was used on Hubble servicing missions.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.