Product Description: 4*50mm Straight Shank Square End Mill/Solid Carbide End Mill/CNC End Mill Cutter Product name countersink bit TRS >3600 N/mm2 HRA 91.8-92.4, HRC:45/55/60/65 Grain size 0.2-0.6μm Helix angle 30°-45 ° ...learn more
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