This 2.5" to 3.5" IDE hard drive converter allows you to connect a laptop hard drive to a desktop IDE interface. After that, the laptop hard drive will be detected and can be used as a regular IDE drive in a desktop PC. It is recommended to be used for laptop drive backups or direct data transfers.
i don't know $9 for five piece. until i received five piece item and contacted with seller, all these items are with perfect build quality.
Good value for money^_^