The Grip 16237 5/8-Inch x 5-1/4-Inch Trailer Receiver Pin can be used with ball mount or universal and custom receivers. Features: * Securely holds the ball mount in the receiver * Zinc plating resists rust and corrosion What"s In The Box: * Grip 16237 5/8-Inch x 5-1/4-Inch Trailer Receiver Pin