A round sling is one of the most versatile lifting tools available—capable of handling loads from 0.5 tons in light industrial applications to 500 tons in heavy engineering and offshore lifting operations. But how does a single product type span such an enormous capacity range? The answer lies in the construction of the sling, the number of load-bearing core yarns, the protective sleeve design, and the applicable safety standards. According to EN 1492-2, round slings must have a safety factor of 7:1, meaning a sling rated for 1 ton has a minimum breaking load of 7 tons. This technical overview explains how round sling capacity is determined, the factors that affect load limits, and how to select the right sling for your application.