... mamufacture factory 2.all size are available Shackle with Different Standards Made of cast iron, carbon steel, stainless ... , aluminum, and zinc alloyStandards: JIS, DIN, ASTM, and BS (US, European, and Australian type)Products: turnbuckle, hook, thimble, shackle, chain, steel wire rope ... clip, swivel, and ringCustomized designs and productions are welcome U type shackle