10pcs 1/8'' 0.8-3.175mm PCB Drill Bits Engraving Cutter CNC End Mill Tool Set For Power Tool 10pcs carbide micro drill bits cnc pcb engraving end mill tool set 1 8 shank 0 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 3 17mm