Features and precautions:1, the trailer rope by a special process, to prevent and reduce the trailer between the two vehicles moving.2, the trailer rope for the wire material, the use of more secure at night.3, forged lock iron hook is more secure, and can prevent the hook when the trailer off.4, do not exceed the approved tonnage of use.5, the surface of PVC protection, to prevent scratching when the trailer paint, can not drag on the rough surface6, the trailer should be slowly pulled tightly, can not quickly drag7, should always check to ensure the normal use of towing.