INCLUSIVE DESIGN-The dynamic tri-ball could be easily rotated to the appropriate size for meeting all your towing needs. Multiple sizes of tri-ball is compatible with all couplers on the market and available in various vehicles such as heavy duty truck, RVs and even boats. SMOOTHER RIDING-The coordination of screw built in the ball mount and iron pad could narrow the gap between trailer hitch and hitch receiver through tightening the screws with hexagon wrench. The cushioned shim adhere to tri-ball is also designed for resisting rattling, wobbling, jolting, clunking, vibrations and especially the annoying noise while towing which brings the sensation of no trailer at the back. EXQUISITE TECHNOLOGY-Trailer hitch is coated with frosted dark finish to withstand corrosion of rain, dust, high temperature and other corrosive effects. The tri-ball welding technology is carried on international topping welding equipment.