Ultralight and ultrastrong for a quantum leap in your climbing. We've paired our ultra-light Quantum carabiners with even lighter 10 cm Atmic dogbones. At just 52. 5 g, this ultralight quickdraw offers full-strength protection for adventures where every gram counts. Effortless, snag-free clipping is ensured thanks to an ultra-wide gate opening, double-bent wire gate and partially hooded Bull Nose.