The steel guides, for when you have found a balisong you like and now have to choose between 440C, D2, VG10, high carbon and Damascus without a metallurgy degree. There are two, and they come at the same question from slightly different directions. 440C vs D2 vs Damascus compares every steel we sell on edge retention, rust resistance, ease of sharpening and toughness, and says which one suits a first knife, a humid climate or a collection. D2 vs Damascus vs 440C looks at how each steel behaves in a working balisong rather than on a spec sheet.
Short version if you are in a hurry: 440C for low maintenance, D2 for edge life, high carbon if you like the traditional feel and do not mind oiling, Damascus if the pattern is the point. The guides explain why, and where each of those rules bends.