Sonnet Thunderbolt cable lok, 2-pack Helps Previent Accidental Cable DisconnectionWhen used with ThunderLok-compatible products, secures Thunderbolt cable from accidentally being unplugged Easy to Install and UseSlides over one end of a Thunderbolt cable, and then secures it to the device by you turning a thumbscrew Won't Get LostDoesnt attach to Thunderbolt connector, but remains on cable even when disconnected