The screws are the same type that are used to screw in a CD-rom or a floppy drive in a PC. They may be a little longer, but I fixed that by putting two washers between each screw and the Harddisk. That way there's also no way the harddisk will ever touch the metal of the drive bay too.
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Riocar 80gig S/N : 010101580 red
Riocar 80gig (010102106) - backup