Specifications: Material: Tungsten steel(cutter blade), aluminum(holder) Used: for Roland Length: 24mm / 0.94" Shaft Diameter: 1.5mm / 0.06" Angle: 30°, 45 °, 60° Cap Color: Yellow(30°), Red(45°), Blue(60°) Holder Diameter: 12mm / 0.47" Package Includes: 15 × Cutter Blades1 × Holder These cutter blades are the standard blades that used for cutter. They are recommended for all standard cast and vinyls as well as other thin materials. The cutting edge quality is good with high hardness, greater strength, better abrasion resistance, high durable degree. The tip of the blade is very sharp.