Crampons for Black Diamond Helio Bindings. The Helio crampons are extremely light and both strong and flexibility thanks to a decrease in material thickness (2mm). Available in 4 different sizes, these crampons are developed and manufactured using the best aluminum alloys. Their aggressive tip shape allow maximum grip even on the hardest and most icy snow. Four small holes have been created to offer the ability to fix the rampant to the boots through a lanyard in case of emergency.