CM Anchor Shackle, 135 ton, 138 in, 112 in Pin dia, Screw Pin, 519 in Inner Length, 314 in Inner Width, 214 in Opening, 314 in Eye Outer Size, Carbon Steel Body, Alloy Steel Pin, GalvanizedScrew Pin AnchorChain Shackles Allow Quick and Easy Removal of The Screw Pin and Can Be Useful in Applications Where The Shackle is Frequently Removed, But Not So Much in Applications Where The Pin is Subject to Torque or Twisting