The Klein Tools 69400 Line Splitter separates the hot from the neutral and ground wires on a standard 120 Volt outlets so that current measurements can be made with a current clamp. Without the Line Splitter, the current clamp measures the load current going in both directions, effectively cancelling the measurement. The Line Splitter has a standard measurement section and ten-times multiplier section for use with less accurate or higher ranged clamp meters.