High carbon steel: It has sufficient bending strength and wear resistance to ensure high work efficiency. The nano blue coating enables the cutting edge of the knife to maintain critical cutting edge and lubrication, has extremely high nano hardness andheat resistance. Material - Using ultra-fine grained carbide with good milling and cutting performance With ultra-fine cemented carbide material, it has high hardness, high strength, high wear resistance and high bending strength. Excellent millingperformance, high efficiency, smooth chip removal, stable and reliable: AD sharp cutting edge, milling, piercing and flat edge, clean, neat surface, no disturbance. Application: PCB, SMT, CNC, mold, plastic fiber, carbon fiber, hardwood, circuit boardand other precision components. Suitable for 3D embossing, cutting, engraving, slotting, 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 / 3.175mm), 10pcs. Shipment quantity: 1 set Package Contents: Only the above package content, other products are not included. Size: diameter: 0.8-3.175mm, length: 38mm (Reminder: The size is measured by hand, please allow 1-2cm measurement error) Color: as picture shown (Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.) .Items from YU wen's store