Petzl on Twitter: "Anchor building is more than placing gear. You need to know your angles too! #Climb http://t.co/X91HqkjOaN #PetzlTips http://t.co/n7zQB7y6Gi" / Twitter
Amazon.com : PETZL Coeur Steel Climbing Anchor Hanger 12 mm Single Unit : Sports & Outdoors