Thunderbolt connectors are held in place by friction. While that works well in situations where equipment remains undisturbed while operating, when there"s a chance of movement nearby, there"s a chance the Thunderbolt cable can be unintentionally unplugged, possibly leading to loss of your work or data. To solve this problem, Sonnet designed the ThunderLok, a Thunderbolt connector retainer clip, to prevent accidental cable disconnections from many of Sonnet"s current Thunderbolt products. It is easy to install and use-just slide it over one end of the cable, and then plug in the connector and secure it to the product by turning a thumbscrew. Because of its unique design, ThunderLok does not attach to the connector, but remains on the cable so it won"t get lost when not in use. Sonnet already includes a single ThunderLok with many of its Thunderbolt products. Buy additional ThunderLoks to secure a downstream device"s cable! Works with all known copper Thunderbolt cables. Does not work with optical Thunderbolt cables.