Material: Aluminum alloy (surface oxidation),Tungsten steel(blade)30,60,45design fits most of cutting plotter. and extra .Super wear Resistance,high hardness, Application:fit for and most domestic and plotter Carbide tip with higher hardness (HRA93),higher hardness,greater strength, tip more ,cutting plotter lettering faster Note:Lighting,display and other factors may cause COLOR SHADING Colour:Photo Color Material:steel Size:Full length: 23.5mm diameter: 2mm Package Contents: 5 * 45 degree red knives 5 * 60 degree blue knives 1 * tool holder Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.