The Cynch-Lok™ pole-climbing system was developed in cooperation with actual climbers for optimum quality and performance. It easily hitchhikes to the top of poles with diameter/circumference ratios from 5.5/17.5 in (14/45 cm) to 18.5/58 in (47/147 cm), and meets CSA standards for dry, wet, and icy pole surfaces. The polyester web lanyard will endure extended use in high-stress environments. Bells and whistles like a one-handed roller adjustment system, ergonomic grips that eliminate pinch hazards, and a stopping cleat ensure that this product will serve you well, job after job.