ANCHOR SLING 6' LOOP END PASS-THROUGH. This ANCHOR SLING 6' LOOP END PASS-THROUGH is strong, durable and reliable so you can keep your workers safe from falling. It is designed for quick installation at multiple anchor points - round tubes up to 6" O.D., square / rectangular tubes up to 3/4", D-rings or threaded rod connecting two anchors. In addition, it provides many anchoring options close to the point where materials are being handled or manufactured.