LS5 Carbon Steel- The LS5 Carbon Steel from Bauer features a carbon chrome coating, which hardens the edges of the blades, and increases overall durability. The internal core of the LS5 Steel is also softer than a typical blade, which improves the sharpness and consistency at the edges. According to Bauer, the LS5 Carbon Steel will have an approximate 61-69% improvement in overall sharpness level compared to other similar blades. The change is so drastic, Bauer suggests that you may need to choose a duller radius on the Bauer Supreme 2S skate. They feel that you will be able to maintain a strong bite on the ice, with a more shallow hollow because of the improvements made in the quality of the steel. A Bauer/NHL study found that most players chose a more shallow hollow after trying the LS5 Carbon Steel.