Seachoice Spring Shackles connect double eye leaf spring to rear hanger or equalizer on boat trailer suspension systems. They are punched to accept 9/16 inch splined shackle bolts. Made of 1/4 inch zinc-plated steel for strength and excellent corrosion resistance. Seachoice is committed to delivering quality marine accessories and OEM replacement parts to satisfy fishing, boating and watersports enthusiasts worldwide. Seachoice is run for and by boaters, offering a wide-ranging product line while remaining affordable.