Power Ratchet Tool
This high-torque power tool was a staple of the first three servicing missions to the Hubble Space Telescope. It was used on missions STS-61, STS-82, and STS-103.With speed, torque, and number of rotations controlled by its computer, the astronaut used the tool to apply or remove fasteners.
Image Number: WEB14597-2015
Credit: National Air and Space Museum, Smithsonian Institution
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