Electric DrillChina 5PCS Inch Hex Shank Spiral Flutes Titanium HSS Step Drill Bit Set for Multiple Hole Metal Cutter in Aluminum Case (SED-SD5-ST), Find details about China Step Drill, HSS Step Drill from 5PCS Inch Hex Shank Spiral Flutes Titanium HSS Step Drill Bit Set for Multiple Hole Metal Cutter in Aluminum Case (SED-SD5-ST)