Years of development, testing and fine tuning has made our sewn Prusiks, Purcells and cord a preferred choice by rescue schools, agencies and rescuers everywhere. Our 100% nylon sewn products offer unmatched performance—with strength equivalent to a tied Prusik loop, just without the cumbersome knot. Our factory-sewn SecureStitch™ is covered with durable clear shrink tubing that allows for regular inspection and helps protect the stitching for longer life. These bound-loop Prusiks and Purcell were designed specifically for use with our AZTEK ProSeries® System. Working-At-Height / Industrial Rope Access / Technical Rope Rescue Working at height requires reliable, quality equipment. The AZTEK Bound-Loop Prusiks and Purcells can be used with confidence in work-at-height maneuvers for industrial rope access or technical rope rescue when used in accordance with the regulatory safety standards under which they fall. Always use life safety equipment and gear according to the regulatory safety standards for which it is classified and/or certified.