Our new super duty twin loop runners are a multi-purpose tool. They may be used as anchor slings, hose grab tools, to secure smoke ejectors, as stirrups in personal ascending systems, to drag equipment, to secure ladders and as a tether between rescuer and victim. Our super duty runners are made of 1" woven nylon 9,800 lb. webbing. All runners are sewn with nylon thread. Weight will vary with length. Figure 1.7 oz. per foot of finished length. Made in the U.S.A.