Our stainless steel long D shackles are manufactured by electrical upset methods.
http://www.cn-rigging.com All our shackles are made in China, and are supplied highly polished.
The shake proof shackle has both heads threaded. The pin will not fall out, but may still be unscrewed from the partially threaded second head. The shake proof shackle pin incorporates an innovative polyurathane ring which enhances the fit of the shackle pin. Once in position the shackle pin will not vibrate loose. The shake proof shackle incorporates the Smart-Lock pin. This pin benefits from a unique locking mechanism. When the ring is threaded into the shackle body the ring acts like a viscous liquid and binds itself to the internal threads in the shackle head. We are trading company and manufacture in China. And we are mainly engaging the rigging hardware, casting forged, such as shackle, turnbuckle, wire rope clip, eye bolt, thimble, hook, wire rope clamp, splice, couplings and so on. The material is carbon steel and stainless steel. If any requirement, pls feel free to contact us.