Prevent accidental disconnection of C14 plug-in power cords from C13 output receptacles. Place a Plug-lock insert over any C14 input cord and connect it to any C13 outlet. The insert strengthens the connection of the plug to the outlet, keeping critical equipment plugged-in and running during routine rack access and maintenance. Supplied as a packet of 5 (3 blue + 2 red). Features: - Prevent accidental disconnection of C14 plug-in power cords from C13 outlets - Corrects loose-fitting IEC60320 power connections - Keep vital network equipment plugged in and running - Pull tabs enable safe retraction of the insert - High strength PA66 nylon UL94 material with V2 flame rating