These objects have a metal frame, that is just wider than an SDS module, attached to a handle. A spring-loaded operating handle is mounted inside this handle and connects to two extensions with pins that are spaced exactly the same width as the two holes on the extraction corners of the SDS boards. When the pins are inserted into the holes in the module and the inner handle is squeezed, the pins pull on the module while the frame braces against the card cage, thus removing the module.
Miscellaneous/tools and hardware
Gift of National Oceanic and Atmospheric Administration (NOAA)