Including Black Diamond Wired Hexes No. 4-10 racked on a strong OvalWire carabiner, the Wired Hexentric Set No.#4-10 Nuts offer particular reliability in rapidly widening cracks unsuitable for cams. Their subtly asymmetric cross-section, with flat sides and a slight end-wise taper make them very easy to rack and place in bottlenecks, and the included galvanised steel cables are as durable as they come.  They offer three different widths when turned on their axes, and another when placed end-wise - great for a range of placements in any climbing condition._6061 T-6 aluminum with swaged cables