Drive Covers: Depends on case
Transfer Bracket: Hell if I know
Floppy Drive: Just a bay. Also usable for a harddive, not sure though
Bay Covers: Covers for like cd drive spaces.
Anodized Thumbscrews: ''Thumbscrew''. Its like... A thumbscrew to unscrew the case
Aluminum Case Handles: Didnt see the thumbnail. But.. There just metal (aliminum) casing for a handle on your case
Casters: Good question
Case Options: Give you options
Sleeve/Heatshrink Color: The giant block that covers your processor.