These shackles come complete with grade 8 hardware, inner sleeves and urethane bushings. The shackles will help you relocate and install longer rear leaf springs. These are available in 9" and 12" lengths, with these shackles you can achieve up to 18" of rear wheel travel with the appropriate rear springs. Factors such as your bed, fuel cell and building a complete cage all vary from one truck to the next. The mounting locations of your hanger and leaf spring length will determine the final lift height.