Precautions: Normally, the automatic traction rope cannot be pulled to the end with great force at one time! In the process of use, the master must remember to lock the dog before allowing the dog to move freely, so as not to suddenly run forward, causing the violent overshoot and damage to the movement. Almost all automatic traction ropes have this weakness. It is recommended to use a conventional traction rope if you mind this problem, thank you for your understanding and cooperation.