Black Finish Jobber Drill Set Metric: 1.0 - 10.0 x 0.5mm Rises | 19pc Width 13 mm The result is a very

The result is a very short blade life

Heavy duty die cast zinc alloy construction

You must select the correct tpi for the thickness of material you are cutting

Optimised geometry to cut paper and card

low and high steel alloys

Black Finish Jobber Drill Set Metric: 1.0 - 10.0 x 0.5mm Rises | 19pc Width 13 mm The result is a veryBlack Finish Jobber Drills (also called blue finish) acheive their distinctive colour by steam tempering, a thermal process resulting in a porous tool coating. This surface helps to keep lubricant on the tool, particularly important on the cutting edges, thus reducing friction and cold welding. The 118 Split Point drills are self centering and ideal for use in materials such as mild steel and cast iron. Black Finish Jobber Drills Metric: 1. 0 10. 0 x