The Bracket-525 drive adapter allows for a 3.5 -inch drive size device to be mounted in standard 5.25 -inch drive bay. It works with IDE, SCSI, or SCA 3.5 ” drives and includes mounting screws. newegg MAXIMIZES INTERNAL SPACE This drive bay mounting bracket lets your 3.5" drive fit nicely into a 5.25" drive bay, maximizing the internal space of your computer case for efficient usage. newegg WIDE APPLICATION AND EASY INSTALLATION The BYTECC Bracket-525 works with U2CR-318/HUB, U2CR-368, U2CR-701, UFH-421, BT-145, and BT-146. Eight (8) screws are included for mounting the bracket into the PC case.