Metolius connects the Ultralight Curve Nut"s wires directly to the head to eliminate the swage in classic-style nuts and reduce its weight by 30%. CNC machining allows Metolius to shave away every speck of unneeded material and put a smile on the faces of ounce-counting climbers everywhere. The Ultralight Curve Nut"s straight taper and side-to-side curve allows solid placements, even in slightly flared cracks. Product FeaturesMaterial: aluminumStrength: (1-4) 6 kN, (5-10) 10 kNWeight: (1-4) 0.7 oz, (4, 5) 0.8 oz, 6) 1.2 oz, (7) 1.3 oz, (8) 1.5 oz, (9) 1.6 oz, (10) 1.9Recommended Use: Manufacturer Warranty: 1 year