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Micro - Grain Solid Carbide V Graver For Cutting Steel, Copper, Aluminium CNC Carbide Bits Micro - Grain Solid Carbide V Graver for Cutting steel,copper,aluminium,hardwood,acrylic,marble,etc. Description: Bits are made of micro-grain solid carbide, Produced by Walter CNC grinding machines. Rotating speed: 12,000-40,000 r.p.m OEM and ODM are available Applications: For processing steel,copper,aluminum,hardwood,acrylic,marble,etc. Specifications: Competitive Advantage: 1):