These tough swivels are designed to handle higher thrust loads for extra cable safety and faster straight pulls. Precision-machined body is made of high quality stainless steel with higher working load ratings than comparably sized swivels available on the market. These heavy-duty swivels are built with a thrust bearing for tensile load and a radial bearing for bending load. Working Load Limit for under ground applications is based on a horizonal pull of 3:1 while aerial applications have a WLL of 5:1