The Metolius Curve Hexes are very lightweight and work better than cams in iced up, wet or dirty cracks making them indispensable for alpine climbing. Curved Hexes are also a key piece for those just starting out Trad Climbing and building a rack. It's easy to judge placement quality and they're a great value at about 1/5 the price of a cam. No rack is complete without at least some key sizes of Hexes! Features: The classic hex design improved by adding curved faces. 4 placement options. The range of a cam at a fraction of the price and weight. Color coded tubing makes identification easy. Extruded 6061 - T6 Aluminum. Pre-packaged set of all 10 Curve Hexes.