ITEM NAME:1106SS Hard Drive Caddy 3.5 inch Stainless Internal Hard Drive Mounting Brac Hn.2, Support for Multi-bay refit,your can easily integrate idle optical drive bay to a removable Multi-bay hard drive enclosure. 3, Bouncing-Pin Design change hard drive easier. 4, Latch Design:No more worry about hard drive eject when using,more stable to reading data.