The American Mountain Guides Association and Outdoor Research have teamed up to create several high quality climbing videos. In this video, AMGA Instructor Team Members Olivia Race and Dale Remsberg discuss the pros and cons of a master carabiner.
The concept is pretty simple. If two bolts are close enough together, you can use a large locking carabiner for a master point. Following are a few things to remember from the video:
1) Use when equalization has been created by the bolted anchor itself.
2) Quick to build and clean.
3) Avoid heavy off-axial loading directions.
4) Large pear-shaped auto-locking carabiners are ideal.
--Jason D. Martin