The present invention extends to a carabiner intended for use as an adjustable anchor. In general, embodiments of the invention include a carabiner that includes a pinching mechanism. More specifically, some embodiments of the invention include a carabiner having a pinching mechanism that includes one of a slidable pin, a rotatable cam, or a pivotable block. Additionally, some embodiments of the invention include a rope, whereas other embodiments can be used with a rope supplied by a climber.