ITEM NAME:10pc 1mm Tungsten Steel Mill Engraving Bit End Mill CNC Milling Cutter Drill Bit 10pcs 1.0mm Tungsten Steel Mill Engraving Bit Router PCB CNC Rotary Cutting Tool SPECIFICATIONS.(5) The surface of milling groove,hole and plate edge are clean, neat, without burr. 2) These PCB end mills design for CNC/PCB Milling Machine,and diminished drill flux. 3) With good milling, cutting performance, to ensure that the work efficiency.