Trimax Double Tow Ball 2in Female & 2 5/16in Male. Easily slide double ball assembly from drop bar and flip to increase or decrease ball size. Features chrome plated steel construction for durability and reliability. The shack diameter is 1" diameter shank by 2-1/2" length. The 2" Female Tow Ball features a towing capacity of 8000 lbs. while the 2-5/16" Male Tow Ball features a towing capacity of 10000 lbs. Torque Specs: Torque to 240 ft./lbs. Features of Trimax TDBC22516 Double Tow Ball 2in Female & 2 5/16in Male 2" Female tow ball and 2-5/16" tow ball Fits Razor Steel Adjustable Hitches (PB SFP SX) Fits Aluminum Razor Fixed Mount Hitches (ALFM) Easily slide double ball assembly from drop bar and flip to increase or decrease ball size 2" Female Tow Ball features a towing capacity of 8000 lbs. while the 2-5/16" Male Tow Ball features a towing capacity of 10000 lbs. Package Contents: Trimax TDBC22516 Double Tow Ball 2in Female & 2 5/16in Male Trimax TDBC22516: Double Tow Ball 2in Female & 2 5/16in Male