Camillus 9'' CUDA Folding Knife with Cuda Opening Technology and 3.75" features an AUS-8 Japanese Steel Blade. AUS-8 offers exceptional balance between toughness, edge sharpness, and corrosion resistance. This steel is bonded with Carbonitride Titanium that resists rust and corrosion and is up to 10x harder than untreated steel so the blade stays sharper, longer. Hollow ground blade. Incudes an extremely durable ergonomic G10 handle. Lifetime Warranty.