Tway 1″ x 4' Pipe Lifter Sling is made of the same material as wire rope slings. They are a single eye sling with a 2″ X 4″ long swage button installed on one end that locks into a tea cup which is used to lift pipes at the midpoint. The heavy thimble on the other end will fit most excavator hooks. Working Load Limit of 8.5 tons.