Blades is stainless steel, through the grinding polishing processing, high precision, nice lettering quality. Higher hardness, greater strength, tip extra , reducing plotter lettering faster. Good put on resistance,no burr, difficult to rust Angle: 45 degree(Red) Fit for: Graphtec CB09 and Graphtec Type: Slab Milling Model Number: KZ054 colour:Red & silver material:Tungsten metallic size:19mm Package Contents: 15*carving knife 15*spring plastic Only the above equipment content, varied merchandise shouldn't included. Note: Light and diversified displays may cause the color of the object within the photograph a bit varied from the genuine thing. The measurement allowed error is +/- 1-3cm.