General Tools CL10 Metal Pipe and Electrical Cable and Circuit Breaker Locator Safely break through any wall by first revealing and locating hidden infrastructure up to 6.6-Feet behind it. Transmitter has three power levels, receiver has variable sensitivity Compatible with one or two-pole circuits Easily identify the circuit breaker associated with an energized or de-energized AC circuit Used with a metal rod, system can locate blockages and constrictions in plastic pipes