Usage Tips:[Material]With carbide materials,edge grinding wheel with ultrafine polishing, ultra-hardness, super toughness,and more wear edge .Compatible with for CB09 Graphtec Cutting Blade Holder. [Blade]30 blades are predominantly used for cutting very thin window and mylar materials such as fabric, thin cardboard and leather;45 degree blade used for most cuts such as standard cast and calendered vinyls; 60 degree blade used for the most intricate and delicate cuts or thicker materials. [Replacement]All blades must be adjusted manually,and the silhouette blades replacement do not automatically adjust in the silhouette for depth needed to cut. [Application]The hard alloy cutter blades are with fine polishing process, and for long-time cutting,suitable for PVC color board,mahogany,wood,MDF and other precision relief. Colour:yellow+red+blue Material:Tungsten steel Size:13.1 x 10.1 x 2.6 cm Package Contents: 10 * 30 degree Cutter Blade 10 * 45 degree Cutter Blade 10 * 60 degree Cutter Blade 1 * Blade holder 30 * Mini Spring 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.