Keeper's Single-Ply Lift Sling features 20,000 lbs. webbing (9,800 pounds webbing per inch width minimum). Meets Type 3, Class 7 standards. Lighter and easier to use than a chain and manufactured per WSTDA standards. One of the main advantages of the polyester round sling is its flexibility. It can mold to the shape of delicate and irregularly shaped load or be used in a choker hitch to securely grip loads.