The Mazzella Supertechlon endless single-path round sling has polyester internal load-bearing core yarns and double polyester covers for lifting heavy loads in lifting applications such as shipbuilding, construction, and other industries. Two abrasion- and cut-resistant layers of heavy-duty polyester webbing protect the sling's internal polyester load-bearing yarns. If the inner layer is visible from beneath the outer layer, the sling should be removed from service and repaired. The external polyester webbing is soft to avoid scratching fragile or delicate loads, and it is flexible to conform to irregularly shaped loads.

This endless (also called type 5 or grommet) round sling is made of a continuous loop of webbing formed by joining the ends of the webbing with a load-bearing splice, and can be used in vertical, choker, and basket lifting configurations. The load-bearing or wear points of an endless round sling can be rotated each time it is used, which can help increase its life when compared to an eye-and-eye round sling. The outer cover is color-coded to quickly determine the sling's load capacity and is embroidered with black stripes; each stripe represents 3,000 lb. of capacity. This sling meets American Society of Mechanical Engineers (ASME) specification B30.9 and Occupational Safety and Health Administration (OSHA) specification 1910.184.

Slings are used to lift heavy objects for industrial applications. Types of slings include web slings, wire rope slings, chain slings, and mesh slings. The appropriate type of sling for an application depends on the strength-to-weight ratio, flexibility and resistance to bending, resistance to abrasion and cutting, resistance to crushing, resistance to stretching, and resistance to high temperatures and other environmental stressors. Slings have one, two, three, or four legs; or a continuous loop of webbing or wire rope. Legs are support branches that extend from a single point at the