This is a tool for reading and writing the NAND on 4GB Coronas. You will need to solder short wires to it (2-3 inches MAX) and then solder the ends to the relevant points. You then need to find a suitable card reader to plug the SD tool into, the Corona NANDs are very finicky to read and finding a card reader that sees the NAND can be hit and miss, we found that internal card readers seem to do the job best.

These involve soldering to quite small pads and for the novice are not ideal as you can end up damaging pads and traces.