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Mirco Diameter Tungsten Carbide Long Neck End Mills Short Flute End Mill Description 1) Quality:all our manufactured parts are inspected by advanced zoller mearsurement. 2) Facility:we have the world lastest 5-axis tools grinding machines. 3) Flexbility:non-standard sizes are also accepted. 4) Number of total flutes:2~4. We use 100% original raw material, the micro grain tungsten carbide powder and cobalt powder(from German)to make the carbide rod, hardness can be 92.5-94.0