... factory specialize in manufacturing all types of cutting & milling tools: Carbide End Mill, Ball & Nose End Mill, Corner Radius End Mill ... Cutter, Dovetail Cutter, Turning Tool, Countersink, Round Rod, Tool Bit, Carbide Tip, Ejector Pin, Punch, Mold Etc.2) Super high hardness ... feel free to contact us. Any questions are highly welcome! Carbide 4 Flute Square End Mill