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 Mill Material: Tungsten steel Bit: Approx. 2mm / 0.08in Shank Diameter: Approx. 3.175mm / 0.13in Blade Length: Approx. 4mm / 0.16in Total Length: Approx. 39mm / 1.54in Quantity: 5pcs Application: CNC engraving machine cutter 5 x CNC End Mill