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D-ring extensions allow easier access to the dorsal D-ring without having to go through the yoga contortions sometimes required to hook up your fall protection, but these extensions are not for every situation and must be used with care. Adding extra length to fall protection can result in additional swing forces acted upon the climber in the event of a fall. That makes intuitive sense. You're making the pendulum longer, so the swing could be wider. Using an extender may be allowed with lanya …