Kahtoola KTS Steel Hiking Crampons Flexible, ultralight, packable hiking crampons for more rugged conditions 4130 Chromoly Steel with dual layer Stainless Steel LeafSpring Extender Bars 10 Spikes (1 inch length) per foot Weight per pair: 23.3oz. (662 g.) 3 Year Warranty. Lifetime Warranty on LeafSpring Extender Bar. Shoes not included.