Wokesi 4mm Cutting Dia,4mm Shank Dia,100mm OAL,HRC60,4F lutes,AITIN Coated,Solid Tungsten Carbide,Square End Mill Flat Endmills CNC Router Bits Deep Cavity Machining Tools(4mmDia&times;4mmShank&times;100mmOAL) Cutting diameter:4mm,Shank Diameter:4mm,Overall Length:100mm. Material:Tungsten carbide,High quality TiAlN coating,getting long tool life. Suitable for process Copply,Alloy,Iron and Steel under HRC60(HRA81).High Performance High micro hardness,high abrasion resistance,good toughness.can be high-speed processing. Package:1x Endmill Cutter.