Husky 87071 1-7/8" Ball 2.5" Width Straight Coupler with Chain Ball size: 1-7/8 inch Inside width: 2-1/2 inch Maximum gross trailer weight: 2,000 pounds Husky straight coupler includes a safety pin as an additional means of securing the ball clamp in a locked position (safety pin is required to be used at all times) and a safety chain to eliminate loss of the safety pin The quick release assembly allows for fast and safe locking and unlocking of the ball clamp for convenient hook-up and disconnect