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2. Anchor (climbing) - Wikipedia

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

   An artificial climbing anchor consisting of a hex and two cams, equalized with slings. A snow picket . Depending on the surface being climbed, there are many types of protection that can be used to construct an anchor, including natural protection such as boulders and trees, or artificial protection such as cams , nuts , bolts or pitons .

3. Figure 8 (climbing) - Wikipedia

   en.wikipedia.org/wiki/Figure_8_(climbing)

   This device utilizes a large surface area in contact with a climbing rope to provide sufficient friction along with the proper technique to be used as a belay device or for rappelling. A figure 8 (sometimes just referred to as an 8) is used in conjunction with a climbing harness and locking carabiner to control a belayed climber's descent, or ...

4. Single-rope technique - Wikipedia

   en.wikipedia.org/wiki/Single-rope_technique

   Other essential items of a personal single-rope technique set are a sit harness and one or more safety cords ("cow's tails") terminated in carabiners, for temporary attachment to safety ropes at the heads of drops and used in maneuvers at intermediate rope belays. To pass intermediate belays on a descent, the ascending devices may also be required.

5. 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 ...

6. 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 ...

7. Belay device - Wikipedia

   en.wikipedia.org/wiki/Belay_device

   Some plates had two slots for double ropes. The slots could also be different sizes for different diameter ropes e.g. 9 mm and 11 mm. A wide wire spring may be attached on one side to help keep the plate away from the brake carabiner to ease feeding and taking in rope. A smaller hole is often present for accessory cord to carry the device.