This 2.5" Adapter Kit comes with the power adapter and metal tray bracket that allows you to install 2.5" Hard drives into your PC. More and more users are now switching over to the 2.5" Hard drives (same drives used in laptops) for the low power consumption (less than .01w in standby mode) and its lower heat.  Check out our online hardware store for the 2.5" HD Adapter Mounting Kit.