Protection Devices
Protection devices, collectively known as rock protection or pro, provide the means to place temporary anchor points on the rock. These devices may be categorized as passive (e.g., nuts, Hexentrics, etc.) or active (e.g., SLCDs and some uses of tricams). Passive protection acts "merely" as a choke when pulled on, and constrictions in the rock prevent it from pulling out. Active protection transforms a pull on the device into an outward pressure on the rock that helps the device set more firmly. The type of protection that is most appropriate varies depending on the nature of the rock.
Read more about this topic: Rock-climbing Equipment
Famous quotes containing the words protection and/or devices:
“After so many historical illustrations of the evil effects of abandoning the policy of protection for that of a revenue tariff, we are again confronted by the suggestion that the principle of protection shall be eliminated from our tariff legislation. Have we not had enough of such experiments?”
—Benjamin Harrison (1833–1901)
“Soon silence will have passed into legend. Man has turned his back on silence. Day after day he invents machines and devices that increase noise and distract humanity from the essence of life, contemplation, meditation.... Tooting, howling, screeching, booming, crashing, whistling, grinding, and trilling bolster his ego. His anxiety subsides. His inhuman void spreads monstrously like a gray vegetation.”
—Jean Arp (1887–1948)