U.S. Marine Corps photo by Cpl. William Jackson/Released 110810-M-0000C-003.jpg
Aug 10, 2011
Spring-loaded camming devices, pictured above, are some of the many tools climbers use while negotiating rock faces. A cam is used by compressing a trigger, then inserting the cam into a crack or pocket in the rock. Releasing the trigger expands the cam. The friction between the cam and the rock is great enough that, when placed properly, it will hold the climber’s weight.
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