ITEM NAME:10pcs 15 Degrees 0.1mm Titanium Coated Carbide PCB Engraving CNC Bit Router Tool 10pcs Titanium Coated Car.(1) Sharp edge cutting with a smooth, no burr. Material: Tungsten Steel. 3) Unique design, the head of the cutter is smoother. Suitable for: Engraving machine. 4) Mirror surface grinding technology, smooth surface, high precision.