HSS M2/6542 Steel 3 Flute Countersink Drillbits 90 Degree Chamfering Drill Bits

H SS M2 (6542 Steel) 3 Flute Countersink Drill-Bit 90 Degree Chamfering. These self-starting point and three-fluted design on the HSS M2 6542 steel countersink allow it to make clean, accurate cuts in zinc aluminium steel plate materials.