TeraFlex Revolver Shackles feature a unique design that hinges and rotates to allow the leaf springs to flex and compress without additional spring stress. These self-supporting shackles fold against themselves on level ground. Their bolt-on design allows them to be easily installed with aftermarket suspension systems for even more performance. Properly installed Revolver Shackles maximize articulation and wheel droop. No other off-road product improves your vehicle�s trail performance with so little investment as the TeraFlex Revolver Shackle!