Metolius Big Wall & Climbing Protection Ultralight Asymmetric Curve Nut Dark Blue 10 UACN010. They are awesome for pin scars and the straight-sided taper makes it easy to judge placement quality. Also they are 30percent lighter than the competition have anodized heads and color-coded collars to match our cam colors. They are the perfect passive pro for anyone looking to lighten their trad rack and in addition our smaller sizes now have stiffer cables to make placements that much easier.