Anchor building climbing kit It provides easy clipping at the top and I usually choose this for when all climbers will be leading the climb. That being said, most areas are set-up with a pair of bolts that can be used to build either a top-rope or lead anchor. Each set comes complete with two bolts, two quicklinks, two chains, and a case. Advanced Outdoor Lead is a comprehensive full day outdoor clinic covering anchor cleaning / rappelling, risk management, top-rope following and the many nuances of outdoor leading. You will typically use a 7mm to 8mm diameter accessory cord to build an anchor. Don’t believe me? Check out this thread. ) as well as how to use natural features like trees, rock threads, and horns and how to join various components into a bomb-proof anchor. When building a top-rope anchor, you want to avoid any potential hazards. BEST. In these situations, build the best anchor available and then extend it out using your climbing rope (Martin, 2017).