1/Blade material:60 Carbon steel 2/Plastic box materials: ABS 3/hardness: HRC 58-60 4/size:60.5*19*0.5mm 1/The blade material is 60 carbon steel or SK5 or SK22/size: 60.5*19*0.5mm or 60.5*19*0.6mm 3/blade hardness: HRC 58-604/Packing method meas:50*24.5*22.5cm weight :19/18kgs number: 100pcs/Plastic box , 1box/card, 48card/carton Heavy Duty 0.025 Inch 2-Notch Utility Blades