•ROUGH AND READY – HSI chain slings are known for their ability to withstand a variety of tough conditions. HSI chain slings offer versatility along with the strength to handle large lifting loads making it a great choice for industrial projects. All slings are manufactured in a certified ISO 9001: 2015 facility. The material’s hardness makes it the logical choice when looking for durability in comparison to other grades that can wear quickly on the inner portion of the link.