Colorado Mountain Industries, a leader in the rock and rescue industry, has a big thing for stainless steel! We all know that stainless doesn't rust, but did you know that pound for pound, it's harder and stronger than regular steel? That strength of stainless is what allows CMI to incorporate high tensile into a smaller product. These blocks include a loose bushing held by a stainless bolt, with large gnarled head, for easy opening. Again, extraordinary quality at an affordable price.