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Hexes are a type of Passive Protection that can cover medium to large sized cracks. Most hex placements are only appropriate for one direction of pull (normally down). Hexes are also known as Cow Bells and Hexcentrics.

Many companies are experimenting with the shape and dimensions of hexes right now (Metolius and Wild Country are bringing out rounded hexes). The unique shapes may be better for your climbing locations so ask locals about the nature of the rock before investing.
Popular Hexes (View all Hexes)

Placing an 'active' Hex
Hexes can be placed at an angle (so two flat sections of the hex are touching the rock). If a downward force is created on the wire (or sling depending on the hex) a rotating force will be created, camming the hex into the rock.

Diagram Below: If the downward force (marked in purple) is created, a rotating force is created (due to the angle at which the wire leaves the hex). This rotating force attempts to turn the hex. The hex locks in place because the width of the hex (marked in yellow) is greater than the width of the rock (marked in green).

Placing a 'passive' Hex
Hexes can be used like a stopper by pulling it into an appropriately sized narrowing crack.

Slings versus Wires
Hexes are available with slings or wires. Wires are firm enough so they extend your reach when placing the protection. Slings are less likely to shake out of place when rope drag occurs.
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