Anti-rattle Silent Hitch Pin® for Class I towing. Removes distracting noise and free-play from the connection between the hitch and hitch accessories, such as bicycle racks and ball mounts for towing trailers. The result is quiet and stable, motionless towing. Hollow tube devices are required for use. 1/2in. diameter pin supports 1.25 inch hitch receivers with Class I and II tow ratings Pin length is 3 1/2 inches (from shaft to end); 4.18 inches overall length Effectively removes shock loads from the hitch connection Steel spring nut insert, split ring, flat washer, retainer clip included Transferable to any 1.25in. towing device that is hollow Tow accessory shank MUST be hollow (NOT solid)