Crampons are traction devices used to improve mobility on snow and ice during ice climbing. There are three main attachment systems for footwear: step-in, hybrid, and strap bindings. The first two require boots with welts, the last adapt to any type.
Oscar Eckenstein designed the first 10-point crampon in 1908, dramatically reducing the need for step cutting. This design was then made commercially available by the Italian Henry Grivel.
Read more about Crampons: Ski Crampons