We designed these shackles as a direct replacement for the various Ford trucks using 2 1/2" wide leaf springs. This includes, but is not limited to, F150 2WD, 2 and 4 wheel drive Rangers and Bronco IIs, and 2 and 4 wheel drive Explorers. These measure 4 1/2" center to center. The shackles include our Delrin bushings and DOM inner sleeves. Sold in pairs.