The PetSafe RFA-1 Extra In-Ground Fence Boundary Wire is a high-quality electronic fence wire designed for pet containment. Made by the trusted brand PetSafe, this model specifically caters to underground fencing systems to create a safe and secure boundary for your furry friends. Perfect for training and obedience purposes, this fence wire ensures that your dog stays within the designated area without the need for physical barriers. It is a crucial component in maintaining the effectiveness of your electronic fence system.