[Tungsten Carbide Insert]: Carbide tipped blade has great hardness, good wear resistance, sharp cutting edge, and long service life. [Wide Application]: Designed to cut materials ranging from low carbon steel, medium carbon steel, high carbon steel (HRB170-270) and stainless steel, also suitable for aluminium alloy, brass, and rigid plastic parts processing. [Professional Design]: 6 Flutes and Positive rake 90 Degree cutting angle reduce insert loss and saves processing costs, which helps you complete your work quickly. [Easy Assembling]: The screw-down clamping system makes the assembling easier. [Main Size]: Shank size: R8 Thread: 7/16"-20 Cutting angle: 90° No. of insert: 6 Jerax tools R8 Shank Indexable 3" End Mill, 3" Diameter 90 Degree High Speed Milling Cutter with Replaceable Carbide Insert