Does your trailer hitch come with too small or two big of a ball? Custom fitting a more durable connection for your trailer? These hitch balls are exactly what you&';ve been looking for. Cold forged for superior strength, you get a durability only trailer guys can design.63882 Shank Diameter: 3/4" Shank Length: 2-3/8" Drawbar Thickness Range: 3/8" - 1-3/8" 63884 Shank Diameter: 1" Shank Length: 2-1/8" Drawbar Thickness Range: 3/8" - 3/4" 2,000 lbs GTW Rating Solid steel hitch balls engineered to meet all safetyrequirements of VESC regulation V-5 Cold forged for superior strength When installing hitch balls, torque all 3/4" shank dia. balls to 160 ft. lbs, 1"shank dia. balls to 250 ft. lbs., and 1-1/4" shank dia. balls to 450 ft. lbs NOTE: Select the correct ball for your coupler on your trailer and be certain the ball diameter required is stamped into the coupler handle or body. Also, please ensure the trailer ball shank fits the thickness and diameter of your drawbar, ball mount or step bumper for proper setup.