Product details:
This adjustable rear leaf spring shackle is zinc plated and designed for race cars with leaf springs. Allows almost unlimited adjustment of wedge on leaf spring suspended cars.Adjustment bolt is 1-1/8 in diameter and 7-1/4 long. Shackle is 8 long, 1-1/2 wide and is 3 inside. Two position bolt is 7/16 and position holes are 1-1/2 center to center.