A camming device is a form or protection used in rock climbing. They are sometimes called SLCD, cam or friend. Camming devices were first invented by Vitaly Abalakov and work on the principle of a Logarithmic spiral. When a camming device is placed any force to remove it (without pulling the trigger) will force the lobes to open, thus resisting the removal force. Use this tage for questions regarding the uses of camming devices

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