Metolius Astro Nuts Sizes 1-5

With an added a transverse taper and silicon-bronze to the revolutionary Curve Nut by Metolius - these mini-nuts tenacious bite in each and every placement. The finest materials - combined with our patented shape - give you a powerful tool for protecting micro-sized fissures. We looked at many different alloys before settling upon silicon-bronze. Steel was just too hard for micro nuts and didn’t allow them to seat into placements - while aluminum was too soft and didn’t provide enough structural strength. Silicon bronze is the perfect material (although very costly) as it exhibits high strength - yet is still soft enough to let the nut bite into the rock’s surface and seat into position with maximum holding power. Additionally - on our larger sizes - we are able to introduce curves into the faces of the Astro Nuts - giving them a massive placement advantage over regular - straight-sided pieces. The small collars on Curve Nuts are color-coded for quick identification. Astro Nuts are a huge addition to anyone's rack - aid climbers - free climbers and alpinists alike. Features: Buy individuals OR pre-packaged sets Pre-packaged sets include 10% discount over purchasing individual units Size 1: Range (min. max.): .12 - .24 in. (3.1 - 6.1mm) Strength: 440 lbf (2 kN) Weight: 0.20 oz (5.7 g) Size 2: Range (min. max.): .14 - .24 in. (3.5 - 6.1mm) Strength: 440 lbf (2 kN) Weight: 0.21 oz (6.0 g) Size 3: Range (min. max.): .16 - .24 in. (4.1 - 6.1mm) Strength: 550 lbf (2.5 kN) Weight: 0.22 oz (6.2 g) Size 4: Range (min. max.): .18 - .26 in. (4.6 - 6.5mm) Strength: 550 lbf (2.5 kN) Weight: 0.23 oz (6.5 g) Size 5: Range (min. max.): .21 - .29 in. (5.3 - 7.4mm) Strength: 550 lbf (2.5 kN) Weight: 0.25 oz (7.0 g)