1Spiral router bit with strong wearresistant, good rigidity as well as not easy to break due to quality tungsten steel material, durable use. 2Excellent chip removal performance can be achieved with the mirror polishing process of the blade, wonderful using experience. 3Incisive cutting edges, high cutting efficiency, with continuous processing, not easy to break. 4About 39mm / 1.54in of the total length and 4mm / 0.16in of the blade length, special designed for CNC engraving machine. 5Including a total of 5pcs milling cutter bit of the package to meet your different demands.Item Type: CNC End MillMaterial: Tungsten steelBit: Approx. 2mm / 0.08inShank Diameter: Approx. 3.175mm / 0.13inBlade Length: Approx. 4mm / 0.16inTotal Length: Approx. 39mm / 1.54inQuantity: 5pcsApplication: CNC engraving machine cutter5 x CNC End Mill