Square carabiners are actually far more practical for hanging and attaching things than traditional round carabiners. The thing is though, finding well made square examples is difficult. I’ve been looking for some to use as an attachment point for a homemade camera cube for months and have found nothing but trash in my search.
Recently, however, I was turned onto Yakoda Supply’s carabiners. My search is finally over. They are the right size, the right weight, they lock, and they are made like someone gave a shit. Perfect.