BEL6700 / 6700 - Application Notes Lowering Shackles drop the rear of your stock truck to achieve a more level look. All Belltech shackles are built from heavy gauge hot rolled P & O steel, and feature heliarc welded construction, powder coated finish and OEM style bushings for a quality ride. Lowering Shackles drop the rear of your vehicle 1 or 2 inches for a more level look.