Sterling 8 mm Bound Loop PrusikProvides progress capture, tandem prusik belay and optimal rope grab for rope rescue. Does away with bulky, time consuming knots and is stronger with its sewn loop construction. These are adjustable. Just hold the heat shrink tube, and pull on the non sewn leg of the loop to make the loop larger or smaller as needed. Available Lengths: 16" and 22" MBS Rating (kN) 20. 0