10 Pieces PCB Mini Drill Bits:
Material: Tungsten steel
Color: color send random
Size: 0.3-1.2mm
The shank diameter is approx. 3.175 mm, overall length is approx. 38 mm, which fit for processing PCB, normal FR-4, CEM-3 boards, SMT, CNC, molds, plastic, circuit board, carbon fiber, composite board and so on