Black Diamond angle pitons are a type of piton designed to be driven into wide cracks. They are specifically for relatively wide rock cracks where conventional thin blade pitons wouldn't work, and they provide high holding power through the spring effect created by bending the material. Features, Target Rock Cracks: For wide cracks where pitons like those from Lost Arrow cannot be used. Material and Construction: Made of chromoly (chromium-molybdenum steel), featuring a spring effect created by bending the material.