THE FIRST PROFESSIONAL TOOL FOR ALL YOUR XBOX 360 HOMEBREW NEEDS !!
The nandflasher is basically a JTag device that lets you read and write to the X360 NAND. This requires an Exploitable console. Is your console exploitable? Well if you have a dash kernel before 8xxxx and the console was manufactured before Jun 18, 2009, then you most likely can use this device.