EnPoint&trade; High Hardness Aluminum Cutting 2 Flutes Carbide End Mill 1/8" 3.175mm Shank 1mm Cutter Dia Metalworking Square Nose CNC Spiral Milling Cutter for Brass Copper Foil IC Substrate Produced from a premium ultra fine solid carbide for maximum tool strength and durability 2 Flutes with large spiral chip groove bring better chip evacuation, preventing from sticking chips Sharp cutting edge produces an excellent surface finish and great work efficiency Less heat build up; 2 flutes also allow for faster feed and speed rates Mainly for cutting aluminum substrate, full copper foil and other high ductility metal plates. And it can also be used for PBGA/BOC/CSP and intergrated circuit substrate molding.