This is a Hot-Dipped Galvanized Leaf Spring Shackle Link for Boat Trailer Double Eye Leaf Spring Suspensions. You will see these spring shackles on both single axle and tandem axle set ups. On your Single Axle Boat Trailer, the Leaf Spring Shackles are located towards the rear, two per side, giving you a total of four. On a tandem axle suspension, they are located in the center, connecting your leaf spring to your equalizer bar, there are four per side, for a total of eight on a tandem axle boat trailer suspension. This Spring Shackle is for use with 1/2 inch diameter leaf spring bolts.
This particular spring shackles measures:
3 3/4 inches total Length
2 1/4 inches Center Hole to Center hole
With 1/2 inch Diameter Holes