Safe and Efficient Load Lifting in Industrial Environments The load is carried in the inner core, and the outer cover increases the service life of the sling. In the Heavy Duty Eye & Eye Round Sling, the eye loops are reinforced to give it extra strength at the connection point, allowing one to stay fixed firmly to the hooks or shackles when making heavy lifts. Read more: https://medium.com/@jsxingsheng/safe-and-efficient-load-lifting-in-industrial-environments-b1a99e5944af