The adjustable heavy duty turnbuckle, also known as Barrel Strainers, Tensioners, Turnbuckles, Fork and Fork Rigging Screws, Bottle Screws or Adjusters. These jaw and swage stud turnbuckles are machined and stamped from type 316 stainless steel for added corrosion resistance and durability. The swage stud and jaw combination add to this turnbuckle's versatility among many rigging turnbuckles.