HIGH CARBON STELL: With sufficient flexural strength and wear resistance, which ensure high working efficiency.The nano blue coating allows the cutting edge of the tool to retain the crucial cutting edge and lubricity with extreme nanohardness and heat resistance. MATERIAL: Using ultra-fine grain carbide with good milling and cutting performance which has ultra-fine carbide material which has high hardness, high strength, high wear resistance and high flexural strength. Excellent milling performance, high efficiency, smooth chip removal, stable and reliable. ADVANTAGE: Sharp cutting edge, milling, perforated and flat edge, clean, neat surface, no disturbance. APPLICATION: PCB, SMT, CNC, mold, plastic fiber, carbon fiber, hardwood, circuit board and other precision components.Suitable for 3D relief carving, cutting, engraving, grooving, milling, etc. CUTTING EDGE DIAMETER: 0.8-3.175mm (0.8 / 1.0 / 1.2 / 1.4 / 1.6 / 1.8 / 2.0 / 2.2 / 2.4 / 3.175 mm), 10 pcs. (zhongchengdaye)