PetSafe Wire Break Detector - RFA-590The PetSafe Wire Break Detector RFA 590 helps you quickly locate breaks in boundary wire for In Ground Fence systems. Designed for PetSafe setups, it guides you to both ends of the damaged wire, making maintenance faster and safer for your pet. Note: it is not designed to detect partial wire breaks. In Ground Fence compatibility: Detects wire breaks for any In Ground Fence system (not designed to detect partial wire breaks). Expandable handle: Locator