These locking power cords are ideal for powering your high voltage/ high current equipment. On one end, the plug connects to a Locking NEMA L5-20R outlet or receptacle, while on the other end the IEC60320 C19 Connector can power servers and tele-communications devices, as well as many more devices and electronics which have the IEC60320 C20 Inlet. Additionally, this power cord features a twist-lock plug which rotates to lock into the matching receptacle.