Thread size: M9, Thread Length: 2-3/4". U bolt open width: 2-3/4" (70mm),adjustable length: 1-5/8"- 4"(41mm-100mm). Suitable for boats trailer, plumbing, roof basket and RV bumper. U bolt open width: 2-3/4", adjustable length: 1-5/8"- 4".
eBay