The TeraFlex Revolver Shackle utilizes a unique shackle design that hinges and rotates to allow leaf springs to flex and compress without additional spring stress. TeraFlex Revolver Shackles are self-supporting and fold against themselves on level ground. Because the shackles are a bolt-on kit, they can be installed easily with aftermarket suspension systems to achieve an even greater level of performance. When properly installed, the shackles will maximize articulation and wheel droop.