1/8 End Mill, EnPoint Carbide Milling Cutter 3.175 mm Shank 1.5-3.175 mm Cut Dia Right-handed Thread End Mill CNC Corn Milling Cutter for Carbon Fiber Insulation Board Oak Mills Set of 10PCS Flute length: 8.5mm(0.335 inch), 9.5mm(0.374 inch), 10mm(0.394 inch), 12mm(0.472 inch). Overall length: 38mm(1.496 inches); Shank diameter: identical 3.175mm(0.125 inch). A premium ultra fine Nano Grade carbide, advanced grinding processing and unique designed shape, hardened, sharpened, making your jobs smooth and out of chips! Cutter diameter: 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.4mm, 2.5mm, 3.0mm, 3.175mm/ 0.059 inch, 0.063 inch, 0.067 inch, 0.071 inch, 0.075 inch, 0.079 inch, 0.094 inch, 0.098 inch, 0.118 inch, 0.125 inch. It is mainly used for the engraving and cutting of PCB, Carbon Fiber Board, Insulation Board and Oak Wood etc.