The Fastway Flash Integrated Scale Ball Mount accurately measures the tongue weight of your trailer for safer and more confident towing. The Scale makes it easy to get a properly balanced load so you can tow with improved steering, better braking control and reduced trailer sway. Adjustments are easily made to match the trailer's coupler height and required hitch ball diameter, making it the perfect choice for someone with several different trailers. Aluminum components are half the weight of a comparable steel ball mount, are rust proof and corrosion resistant, and rated to tow up to 10,000 lb. Includes both 2" and 2-1/2" diameter hitch balls. Fits 2" receiver hitches. Measures tongue weights from 0 up to 1,000 lb.