Z4 Camalots $85–$150
If you’re a trad climber, then having at least one rack of Black Diamond Camalots is a must. The new Z4 cams replace two cam lines, the C3 and the X4. To be flexible and rigid, Black Diamond invented a Rigidflex stem system that includes wires that become tensioned and stiffen the system when the trigger is pulled. When you release the trigger, the wires are no longer under tension and it can flex. One difference between the C3s (three-lobed cams) and the Z4s (four-lobed cams) is that the head width is virtually the same. The Z4 range is seven cams: 0, 0.1, 0.2, 0.3, 0.4, 0.5 and 0.75. Must-have protection for any trad climber.