Yates Professional 4 ft. SD Anchor Nylon Sling #850 New Open package. Was used at a school which taught safety to students training to work wind farms. Any used safety equipment should be inspected carefully and by a professional before use. We do not make any guarantees or recommendations. 4-10 Foot SD Anchor Sling w/Wear Pad. Add versatility to any tactical, rescue or rigging system. Large D ring at ends of the strap allows the sling to be wrapped single, double, triple and rigged choker style depending on the particular situation. Manufactured from 2 inch super heavy duty webbing. D rings are rated at 20,000 lbf.