Constructed of tubular nylon webbing, our loop runners serve as medium-duty choker straps for tree work and climbing these lightweight loop runners are as strong and durable as rope. circular construction distributes wear more evenly because you'll seldom clip into the same spot twice. use for speed line chokers, line redirections, miniature false crotch support systems, a limb handle or providing a footstep where none exists. safe working load information: 7, 000 ultimate breaking strength (ubs), 1, 400 safe working load (swl), 31 (kn). 12 inch length Red.