All Extrema Ratio Tactical Folders have oversized (extra thick) blades of N690 stainless Cobalt steel treated with a black nitrate finish. The handles are made of Anticorodal aluminum with all hardware made of burnished stainless steel. All hardware including pocket clips are black nitrate finished.

These Italian made folders are the toughest folders we have seen. Used by the Italian military, this line of super tough tactical folders will out last any competitor.