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CNC Router Bits, Micro-Grain Tungsten Carbide Router Bits With Replaceable Knives for Woodworking Quick details: 1): Micro-grain carbide tips replaceable. 2): Cutting surface is finished, without burrs and skins char. 3): cutting founctions are better than weld type router bits. 4): Produced by CNC milling machines make sure higher precision. 5): Competitive price and short delivery time Descrition: CNC Router bits with changeable knives. Tool body made of heavy metal,