Indusco stainless steel 316 bolt and nut anchor shackle. Meets design requirements of Federal Specifications RR-C-271 Type IV A Grade A Class 3. Shackles must always be inspected for wear, distortion and damage before use. If the pin or bow is worn, distorted or damaged, discard the shackle. Do not use round pin shackles in rigging applications. Always stand clear of loads being lifted. Working load limit is based on a design factor of 5:1. 4000 pounds working load limit. 5/8-inches nominal shackle size. 3/4-inches pin diameter. 2.44-inches inside length. 1.06-inches inside width at pin. 1.63-inches width at bow. 1.63-inches outside diameter of eye.