Stainless steel, heat-treated, never-rust blades. Mirror finish blades for easy cleanup. Blade thickness is taper ground, for a great feel and flex. Non slip, 2 component ergonomic handles with thumb stop. Lifetime warranty3 Piece flexible putty knife set includes sizes: 1.3", 2" and 3" blade widths. Set is packaged in a black plastic tray with lid and label.