In some PC system design, a daughter board or a module would have B2B (board to board) connector
design to connect the daughter board and the mother board, and the daughter board is very difficult to
remove once it is installed on the mother board in the system chassis due to limited z-height and spacing.
The extraction force of B2B connector usually is very strong, and there is no much room to pull the
daughter board up between the daughter board and the mother board by fingers or tools in a compact
system chassis. The room around the daughter board or module is limited by other components and
thermal modules in the chassis, and the limited room makes any tools hard to use in a compact system
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INC, HP, "LIFT SCREW FIXTURE FOR BOARD TO BOARD MODULE", Technical Disclosure Commons, (August 12, 2019)