This small internal cable lead will let you connect your laptop hard drive to your desktop PC. As these drives use different size data connections, this would not usually be possible, but with this cable you can use a laptop hard drive in your PC to transfer important files to another location, or fit as a permanent any purpose data drive. Cable comes in standard IDE grey, with female data plugs at both ends and one 4 pin male Molex power connection at the 2.5" end.