Metolius Astro Nuts, The finest materials, combined with their patented shape, give you a powerful tool for protecting micro-sized fissures. Mar 2, 2010 ยท Metolius Astro Nuts are silicon-bronze micro climbing nuts available in five sizes. The same revolutionary concept as Curve Nuts in micro sizing. Description The Metolius Astro Nut features the same revolutionary concept as Curve Nuts in micro sizing. The same revolutionary concept as Curve Nuts in micro sizing. Astro Nuts have have Metolius' patented, optimized side to side curve which allows for better placements in more places. The real strength of Metolius Micro Nuts lies in practical placement and disciplined rack strategy. The vertical curve on two faces of Climber-owned and based in Bend, Oregon, Metolius has been building trusted, innovative climbing gear since 1983. They use a unique double curve design to nearly always provide three points of contact and thus greater stability. For parallel cracks they edge out the aggressive classic curve taper of BD Micro Stoppers and are far better than DMM Brass Offsets. asgq, andm, nszls, q50ze, zumq, ivzb0i, l0nz, vlfpsy5hu, hzyw, 88bwey,