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Review: Mammut Smart Alpine and Petzl GRIGRI + (belay devices) - The Climbing Zine
Petzl GriGri Review | Tested by GearLab
Best Belay Devices for Climbing | Switchback Travel
Accidents in North American Climbing - Weekend Reminder: Use a Grigri correctly when lead belaying. http://bit.ly/1FSpINL This 30-foot ground fall accident resulted from a belaying error in which the inexperienced belayer incorrectly