"It's true the Oz is a super-light biner at one ounce (hence the name), but is it the right choice for your sport climbing draws? Sure, if you're doing a multipitch sport route in the Canadian Rockies, or going for a hard, 22-draw onsight, go for it. But for a workhorse sport climbing carabiner, it's probably not the best choice. Why? In order to get the weight out of these lightweight biners, manufacturers are removing material, and though ultimately all carabiners are strong and meet all CE requirements, less material can mean a few things. The smaller size makes is slightly harder to clip. There can be less material in the spine, which makes it more susceptible to bending if loaded over an edge, and there oftentimes is less material on the rope-bearing surface, which means whippers are harder on your rope."