Kahtoola K&bull;10 Hiking Crampons Flexible, Ultralight, hiking crampons with Quick-Fit Bindings 4130 Chromoly Steel with dual layer Stainless Steel LeafSpring Extender Bars 10 Spikes ( inch length) per foot Weight per pair: 21.5oz. (608 g.) 3 Year Warranty. Lifetime Warranty on LeafSpring Extender Bar. Shoes not included.