Jaegher Interceptor is exclusively made from Niobium steel. The Columbus Spirit tubes are a special blend of steel with manganese, chrome, nickel, molybdenum and niobium. This special chemical composition, the combined effect of strengthening for precipitation and reducing the alloy grain size are incredibly enhanced compared to standard steels. After specific processes of progressive drawing and forming, niobium undergoes a special heat treatment that gives the steel its final characteristics. It provides superior mechanical characteristics and higher resistance to environmental effects than conventional steel.