10Pcs 3.175mm Tungsten Steel V Shape Carbide PCB Engraving Bits CNC Router Tool 10 20 30 Degree 0.1mm Machine Accessories
https://www.vogueparade.com/shopping/EN/100006468/1/1005003152710007/10pcs-3175mm-tungsten-steel-v-shape-carbide-pcb-engraving-bits-cnc-router-tool-10-20-30-degree-01mm-machine-accessories//