Moog EV405 Tie Rod End Problem Solver design features a standard 1 3/8 inch wrench flat for easier installation. Wrench flats allow the proper torque to be applied when tightening the inner tie rod end, avoiding rack and pinion gear damage. Knurled stud provides a positive grip when making toe adjustments. Full ball metal stud provides 36 degrees of smooth, consistent, rotational movement resulting in more responsive steering. Loose or worn chassis parts can lead to premature tire wear