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2. Self-locking device - Wikipedia

   en.wikipedia.org/wiki/Self-locking_device

   The earliest type of self-belay device used was the ubiquitous prusik knotted sling used by climbers. The method requires the solo climber to feed out an estimated length of belay rope so that they can reach their next stance and repeat the process as the rope is difficult to feed through the prusik knot while climbing.

3. Anchor (climbing) - Wikipedia

   en.wikipedia.org/wiki/Anchor_(climbing)

   From this expression, the anchor forces can be calculated for selected angles in a two-element, symmetrical, load-sharing anchor. At a V-angle of 30 degrees, each of the two anchors will bear a force of about 52% of the original load. At 45 degrees, each anchor bears 54% of the load. At 60 degrees, each anchor bears 58% of the load.

4. Rock-climbing equipment - Wikipedia

   en.wikipedia.org/wiki/Rock-climbing_equipment

   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 ...

5. Grapple (tool) - Wikipedia

   en.wikipedia.org/wiki/Grapple_(tool)

   A grapple is a hook or claw used to catch or hold something. A ship's anchor is a type of grapple, especially the "grapnel" anchor.. A soldier loading a hook. A throwing grapple, kaginawa (or "grappling hook" ) is a multi-pronged hook that is tied to a rope and thrown/launched to catch a grip, as on a parapet or branch of a tree. [1]

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7. Piton - Wikipedia

   en.wikipedia.org/wiki/Piton

   1960s-era pitons, including: knifeblades, lost arrows, bugaboos, ring angles, and bongs. A piton (/ ˈ p iː t ɒ n /; also called pin or peg) in big wall climbing and in aid climbing is a metal spike (usually steel) that is driven into a crack or seam in the climbing surface using a climbing hammer, and which acts as an anchor for protecting the climber from falling or to assist progress in ...

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9. Snow anchor - Wikipedia

   en.wikipedia.org/wiki/Snow_anchor

   A snow anchor is used both for climbing and for securing tents and other camping gear, that is designed for use in sand and snow. A snow fluke is a bent square or rectangle, approximately 8 by 10 inches (20 by 25 cm), and is made of aluminum or other metal, with a cable attached at two points on the upper surface. [ 1 ]