This is a Reverse type breakout cable. It features a 36Pin (SFF-8087) on one end and fans out to four SATA 7-Pin connectors. Use for connecting a Mini SAS backplane to a SAS/SATA RAID controller or mainboard. The 4 SATA Ports are to be connected to your Raid Card/Mother Board, the SFF-8087 end is to be connected to a Backplane.