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Metolius Astro Nut Packaged Free Set of passive pro keeps your quivering carcass protected on ultra-thin trad pitches with the five most useful sizes (6-10) of these tiny bronze pieces. Metolius color coded these small nuts to allow for faster identification of the correct size, so you can get in pro and keep crankin though the crux before you run out of steam. The Astro Nuts Silicone bronze heads provide excellent bite on tiny features that aluminum just cant match.
Bottom Line: Sew it up with the Metolius Astro Nut Package Free Set when the cracks get thin and the climbing gets hard.