bolt anchor shackle All forged by alloy steel heat treatment processed by ... size, high strength As the link of slings,bolt anchor shackle can used single or double, with full items, range 0.5 ... - 600t, they can be used in various lifting work. 1. Mainly material is SS316 or ... ",1/4",5/16",3/8",1/2" Bolt type anchor shackles