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DPDT (Double Point, double throw switch), see the size of it in the attached picture.
It’s useful in some case, for example, you have TXD and RXD in the two middle pins, and GSM_TXD, GSM_ RXD on other two pins for connecting on one side, and GPS_TXD, GPS_RXD on other two pins for connecting on other side. This is implemented in some of our boards.
When you need more pins, use 2.54 break out pin header and jumpers will be easier, this item only support two levels/throws.