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Rope compatibility: 9 to 12 mm low stretch kernmantle rope; Replaceable aluminium bobbins (main bobbin with stainless insert) Carabiner slot that can accept normal carabiners and Petzl Freino braking carabiner; Short squeeze handle made from metal with red plastic cover; Ability to lock out the handle for one handed descents
A Petzl Croll is an ascending device [1] used in caving and industrial rope access made by the French company Petzl. Its name comes from the town Crolles where Petzl's company headquarters are located but might also be a reference to the nearby cave system of the Dent de Crolles , the exploration of which triggered a lot of technical effort ...
Fernand Petzl, born in 1912, began his caving career in the late 1920s and early 1930s. In 1936, Petzl was introduced to, then small-time caver, Pierre Chevalier. The two began work on improving the technology behind their sport. In 1943, Chevalier designed and tested the first nylon rope to replace caving ladders. This technology provided the ...
After 1933 Petzl began making rope ladders for his own use, developed a scaling-pole in 1940, and began testing the first nylon ropes in 1942. In 1968 Bruno Dressler asked Petzl, who worked as a metals machinist, to build a rope-ascending tool he had developed, and in the 1970s Petzl started a small caving equipment manufacturing company that ...
The marlinespike hitch is a temporary knot used to attach a rod to a rope in order to form a handle. [1] This allows more tension than could be produced comfortably by gripping the rope with the hands alone. It is useful when tightening knots and for other purposes in ropework.
Some climbers will use a single full-thickness climbing rope with a diameter of approximately 9 to 11 mm (0.35 to 0.43 in), and some will use double ropes, or "half-ropes", to reduce rope drag (e.g. one rope is clipped into any given anchor or protection point), which have a reduced thickness of approximately 8 to 9 mm (0.31 to 0.35 in) to ...
Ancient Japanese iron kaginawa climbing hook A chain grapnel – used to recover a cable from the seabed. A grappling hook or grapnel is a device that typically has multiple hooks (known as claws or flukes) attached to a rope or cable; it is thrown, dropped, sunk, projected, or fastened directly by hand to where at least one hook may catch and hold on to objects.
Lighter, thinner ropes, however, have less strength than a thicker rope and will sustain fewer hard falls. Note that some belay devices are better suited for different rope diameters. This is particularly relevant with assisted braking devices, such as the Petzl Grigri (which, for example, works best with a 9.4-10.3 mm thick line [1]) or the ...
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