microSD breakout board can be used for sniffing commands sent from SD host or emulating SD card.

It has pads for connecting 1.27mm pitch ribbon cable and holes for 2.54mm pin header.

Can be used for reading eMMC modules inside of devices (see https://blog.danman.eu/about-adding-a-static-route-to-my-docsis-modem/).

Can be cut with standard scissors to use only one half (male or female).