The ultra-light, clean nose Ultra O carabiners are the mainstay of our carabiner range, and for good reason. Not only do they give high strength to weight ratios and feel great in the hand, they also help to keep components of a system aligned. The deep symmetrical basket allows pulleys, webbing, ropes and even other carabiners to 'centre' naturally and still allow easy stacking of components on either side. A connecting classic.