Nylon long leash for trackingDog nylon leash size: 3/4'' on 13'(2.0 cm on 400.0 cm)Dog nylon leash size: 3/4'' on 20'(2.0 cm on 600.0 cm)Dog nylon leash size: 3/4'' on 27'(2.0 cm on 800.0 cm)Dog nylon leash size: 3/4'' on 33'(2.0 cm on 1000.0 cm) You can use this long line for recall training or tracking.You can give your dog freedom of movement and stay secure moving forward in your dogs training with confidence.The Long Line is also an ideal tool to allow controlled socialization for puppies and young dogs. Use this leash also for correction in behavior of older dogs.We use only solid brass snap hook and we make this leash in several sizes so you can choose best option based on your training goal.This tracking leash goes perfect with our all weather tracking dog harness.