Crosby® Screw Pin Sling Saver Shackle | S-253 - 1-1/2"- 6.5 TonCrosby S 253 6. 5 Ton Web Sling Shackles Engineered for Synthetic Sling Optimization The Crosby S 253 Web Sling Shackle is built for use with larger capacity synthetic slings, offering a squared bow design that enhances load distribution and sling alignment. This shape prevents bunching and sliding, allowing the sling to carry 100% of its rated Working Load Limit something standard anchor or chain shackles can't match. With a wider internal surface