Product Description: Solid Carbide Center Drill Bit 30 60 90 120 Degree With Coating For Steel Material Tungsten carbide TRS >4000 N/mm2 HRA 91.8-92.4, HRC:45/55/60/65 Grain size 0.2-0.6μm Helix angle 30°-45 ° Diameter of ...learn more
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