A tool for use with NAND dumps. It will provide all the information about your NAND, and the Key Vault which is contained within. It can also decrypt/encrypt and import/ export various elements of your NAND such as the SMC.
I went to auction at a mom/pops video game store few months ago that was closing, and bought 11 slims for $200, 1 was DOA but 10 work fine. so hella deal. Already rgh3'ed 8 of them. But most younger kids don't even want anymore, unless it plays stupid "fortnight", or newer shit.