The ESI  -USHACKLE050 screw pin anchor U shackle is made of galvanized steel. The anchor shackle is a tough and durable accessory for Trussing and Stage Roofing Systems and nylon slings, as well as polyester slings. Paired with a lifting sling, they help protect the eyes of your sling from wear and tear on clevis hooks. Also excellent for use in hanging video walls. ESI  -USHACKLE050 2 Ton Screw Pin Anchor U Shackle Features: Size: 1/2".Pin Size: 5/8". Inside Height: 1.88". Mouth Width: 0.81". Inside Width: 1.31". Weight: 0.66 lbs. WLL: 2.00 Tons. Safety Factor: 6:1. Material: Galvanized Steel.