GM CLIMBING 29kN UIAA Certified Micro Pulley Slack Tender for Hitch Tending GM CLIMBING Micro Pulley with Fixed Side, 29kN, compact and light, compatible with rope up to 1/2" (13mm), CE and UIAA certified. A perfectly quality-manufactured micro pulley which is essential for a double-roped climbing or rescue system setup. Rating to 29kN /6500lbs for high durability to satisfy all your requirements; Light, compact and quick to install on the rope. Frequently used in climbing system to reduce the overall friction in order to improve efficiency of your climbing, like slack-tending in spit tail climbing, reducing wear on the bridge when installed on the harness, etc. As a general-purpose pulley, this micro pulley excels great as well in many other applications, such as hauling, transporting or other mechanical advantages.