This Slim IDE Optical & 3.5in Hard Drive Mounting Bracket offers multi-purpose functionality, acting as either a Drive Bracket or cage to mount any slim IDE CD/DVD drive in a standard 5.25in bay of your computer, or to mount a slim IDE optical drive and regular floppy or hard drive in the same 5.25in bay. This kit also includes a slim IDE to 40-pin IDE adapter, for connecting a slim IDE optical drive to a desktop IDE motherboard or controller card.