This Jiem joint is used to provide additional support for the steering shaft on trucks. Fits 3/4-inch DD or round steering shaft. Includes one 3/4-inch Heim joint and (2) jamb nuts This Jiem joint is used to provide additional support for the steering shaft on trucks. Fits 3/4-inch DD or round steering shaft. Includes one 3/4-inch Heim joint and (2) jamb nuts Compatible with 1947-1991 Chevrolet/GMC Truck Compatible with 1947-1991 Chevrolet/GMC Truck