The Monoprice 8781 SATA data cable conforms to the SATA III standard, meaning it can facilitate data transfer speeds of up to 6 Gbps, though it is still backwards compatible with SATA II and I controllers. It provides the connection between the motherboard and the SATA device so data can be transferred between the two. The locking latches make sure each end of the cable is secured to prevent data loss. This cable has a 180 degree straight plug on one end and a 90 degree plug on the other, each convenient in certain situations. For example the straight connector is perfect for most motherboard SATA ports. If hard drives are up against the panel of a PC, 90 degree connectors do a better job.