Metolius has dramatically improved upon the classic hex design by adding curved faces. This opens up innumerable placement options by allowing the Curve Hex to slide past nubbins and irregularities that would block a traditional, straight-sided hex. The curves also allow C.H.s to cam into position by rotating on the convex face and setting up super-stable, 3-point contact with the concave side. Each piece offers four different placement options yielding a range that is similar to a camming unit of comparable size. Curve Hexes are very lightweight and work better than cams in iced up, wet, or dirty cracks, making them indispensable for alpine climbing. C.H.s also make a great starting point for learning the basics of traditionally protected routes. It's easy to judge placement quality and they're a great value at about 1/5 the price of a cam. Specs: size dimensions - min. max. strength weight 1 .42 - .61"(10.7 - 15.5mm) 1350 lbf(6 kN) 0.7 oz(20 g) 2 .46 - .67"(11.7 - 17.0mm) 1350 lbf(6 kN) 0.8 oz(23 g) 3 .55 - .79"(14.0 - 20.4mm) 2250 lbf(10 kN) 1.4 oz(40 g) 4 .65 - .90"(16.5 - 22.9mm) 2250 lbf(10 kN) 1.7 oz(48 g) 5 .85 - 1.10"(21.6 - 27.9mm) 2250 lbf(10 kN) 1.8 oz(51 g) 6 1.05 - 1.30"(26.7 - 33.0mm) 2250 lbf(10 kN) 2.1 oz(60 g) 7 1.25 - 1.66"(31.8 - 42.2mm) 2250 lbf(10 kN) 2.6 oz(74 g) 8 1.57 - 2.02"(39.9 - 51.3mm) 2250 lbf(10 kN) 3.5 oz(99 g) 9 1.93 - 2.60"(49.0 - 66.0mm) 2250 lbf(10 kN) 4.7 oz(133 g) 10 2.12 - 2.92"(53.9 - 74.2mm) 2250 lbf(10 kN) 6.0 oz(170 g)